PATENT ABSTRACT
The present invention relates to a preparation method of carboxylic acids with optical activity, particularly, publishes that very useful chiral carboxylic acids can be obtained by the asymmetric catalytic hydrogenation of tri-substituted α,β-unsaturated carboxylic acids, with the complexes of the chiral phosphor nitrogen ligands and iridium used as the catalysts which show high activity and enantioselectivity (up to 99.8% ee), thus provides a more efficient method with higher enantioselectivity for asymmetric catalytic hydrogenation of chiral carboxylic acid-like compounds, and has important application value to asymmetric hydrogenation of chiral carboxylic acids.

PATENT DESCRIPTION
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is the U.S. national phase of PCT/CN2009/070231 filed Jan. 20, 2009, which claims priority of Chinese Patent Application No. 200810052884.X filed Apr. 25, 2008. 
     FIELD OF TECHNOLOGY 
     The present invention relates to a preparation method of carboxylic acids with optical activity, particularly, publishes the application of iridium complexes of chiral phosphor nitrogen ligands in asymmetric catalytic hydrogenation of tri-substituted α,β-unsaturated carboxylic acids for preparing chiral carboxylic acids. In the invention, very useful chiral carboxylic acids can be obtained by the asymmetric catalytic hydrogenation of tri-substituted α,β-unsaturated carboxylic acids, with the complexes of the chiral phosphor nitrogen ligands and iridium used as the catalysts which show high activity and enantioselectivity (up to 99.8% ee). This is one of the most efficient methods for synthesizing carboxylic acids with optical activity by the asymmetric catalytic hydrogenation. 
     DESCRIPTION OF RELATED ARTS 
     In organic synthesis, the chiral carboxylic acids are important components of a lot of natural products with biological activity and drug molecules, so the development of the synthesis methods of optically pure carboxylic acid-like compounds is one of the hot research fields in the current academia and industry (Lednicer, D.; Mitscher, L. A.  The Organic Chemistry of Drug Synthesis  1977 and 1980, Wiley: New York, Vols. 1 and 2). Among many methods for synthesizing unsaturated carboxylic acids, the asymmetric catalytic hydrogenation of α,β-unsaturated carboxylic acids attracted great interest from researchers for its atoms are highly economic and it is environmental friendly (Jacobsen, E. N.; Pfaltz, A.; Yamamoto, H.  Comprehensive Asymmetric Catalysis , Springer: Berlin, 1999, Vols. I.; Tang, W.; Zhang, X.  Chem. Rev.  2003, 103, 3029). In 1987, Noyori achieved the homogeneous asymmetric catalytic hydrogenation of α,β-unsaturated carboxylic acid—tiglic acid for the first time with the ruthenium acetate complex of BINAP as the catalyst, and obtained the ee value of 91%, and also prepared (S)-Naproxen with the same catalyst, and obtained the ee value of 97% (Ohta, T.; Takaya, H.; Kitamura, M.; Nagai, K.; Noyori, R.  J. Org. Chem.  1987, 52, 3176). Since then, people have developed several chiral ruthenium and rhodium complex catalysts, they achieved very good catalytic effects in the catalytic asymmetric hydrogenation of unsaturated carboxylic acids, and there are many examples of successful industrialization (Boogers J. A. F.; Felfer, U.; Kotthaus, M.; Lefort, L.; Steinbauer, G.; de Vries, A. H. M.; de Vries, J. G.  Org. Proc. Res. Dev.  2007, 11, 585). However, due to the specificity of catalytic hydrogenation reaction, each catalyst can be effective only to one or a few kinds of substrates, so far there are still many substrates that can not be catalyzed well; and, most of known chiral catalysts still have various defects, which appear mainly to be higher amount of catalysts, rigorous reaction conditions, too long reaction time and so on. Therefore, there is a need to find more effective chiral catalysts, to achieve hydrogenation of α,β-unsaturated carboxylic acids with high enantioselectivity. 
     In addition to ruthenium and rhodium complexes, the chiral catalysts formed by the transition metal iridium and chiral ligands are also used broadly in asymmetric catalytic hydrogenation, particularly the asymmetric hydrogenation of the non-functional groups olefin and imine, and results better than other transition metal catalysts can be obtained ((Blaser, H.-U.  Adv. Synth. Catal.  2002, 344, 17; Zhou, Y.-G.  Acc. Chem. Res.  2007, 40, 1357; Roseblade, S. J.; Pfaltz, A.  Acc. Chem. Res.  2007, 40, 1402). However, so far there is only one report about the iridium complex for asymmetric hydrogenation of unsaturated carboxylic acids, that is, Matteoli et. al. catalyzed the asymmetric hydrogenation of a di-substituted α,β-unsaturated carboxylic acid-α-phenylethyl acrylic acid with a chiral iridium catalyst, but that catalyst only showed moderate reactivity and enantioselectivity (Scrivanti, A.; Bova, S.; Ciappa, A.; Matteoli, U.  Tetrahedron Lett.  2006, 47, 9261). Therefore, the development of novel iridium complex catalysts to achieve high efficient asymmetric hydrogenation of α,β-unsaturated carboxylic acids has important research and application values. 
     SUMMARY OF THE INVENTION 
     Aspects of the present invention generally pertain to a preparation method of chiral carboxylic acids by using an iridium complex of a chiral phosphor nitrogen ligand in asymmetric catalytic hydrogenation of tri-substituted α,β-unsaturated carboxylic acids, which is a successful application of iridium complex catalysts in asymmetric catalytic hydrogenation of tri-substituted α,β-unsaturated carboxylic acids, thus provides a more efficient method with higher enantioselectivity for asymmetric catalytic hydrogenation of chiral carboxylic acid-like compounds. 
     The preparation method of chiral carboxylic acids by using the iridium complex of the chiral phosphor nitrogen ligand to catalyze asymmetric hydrogenation of tri-substituted α,β-unsaturated carboxylic acids provided by the present invention is that the asymmetric catalytic hydrogenation of the tri-substituted α,β-unsaturated carboxylic acids is carried out with the presence of an additive and the chiral iridium complex of the chiral phosphor nitrogen ligand to obtain chiral carboxylic acids having certain optical purity. 
     The preparation method of chiral carboxylic acids of the present invention, characterized in that it is carried out by the following catalytic hydrogenation reaction process: 
     
       
                 
         
             
             
         
      
     
     wherein: [Ir] is the iridium complex catalyst of the chiral phosphor nitrogen ligand; R 1 , R 2  are halogen, hydroxyl, C 1 -C 8  alkyl, halogenated alkyl, C 1 -C 8  alkoxy, phenoxy, C 1 -C 8  alkyl-substituted phenoxy, hydroxyl-substituted phenoxy, C 1 -C 8  alkoxy-substituted phenoxy, C 1 -C 8  acyloxy-substituted phenoxy, halogenated phenoxy, amino-substituted phenoxy, (C 1 -C 8  acyl)amino-substituted phenoxy, di (C 1 -C 8  alkyl)amino-substituted phenoxy, C 1 -C 8  acyl-substituted phenoxy, C 2 -C 8  esteryl-substituted phenoxy, naphthyloxy, furyloxy, thienyloxy, benzyloxy, C 2 -C 8  acyloxy, C 1 -C 8  acyl, C 2 -C 8  esteryl, (C 1 -C 8  acyl)amino, di (C 1 -C 8  alkyl)amino, phenyl, C 1 -C 8  alkyl-substituted phenyl, hydroxyl-substituted phenyl, C 1 -C 8  alkoxy-substituted phenyl, C 2 -C 8  acyloxy-substituted phenyl, halogenated phenyl, amino-substituted phenyl, (C 1 -C 8  acyl)amino-substituted phenyl, di (C 1 -C 8  alkyl)amino-substituted phenyl, C 1 -C 8  acyl-substituted phenyl, C 2 -C 8  esteryl-substituted phenyl, naphthyl, furyl, thienyl, respectively; R 1  and R 2  can be same or different; the position marked by the asterisk is the chiral center. 
     The preparation method of chiral carboxylic acids of the present invention is achieved with the iridium complex catalyst of the chiral phosphor nitrogen ligand has the following structural formula: 
     
       
                 
         
             
             
         
      
     
     wherein: 
                                
is the chiral phosphor nitrogen ligand;
 
                                
is cyclooctadiene; n=0-3; R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7  are defined as the compound (I); X is halogen, C 1 -C 8  carboxylate radical, sulfate radical, tetra (3,5-bis trifluoromethylphenyl) borate radical, tetra (pentafluorophenyl) borate radical, tetra (perfluoro-tert-butoxy) aluminum ion, tetra (hexafluoroisopropoxy) aluminum ion, hexafluoro phosphate ion, hexafluoro antimonlate ion, tetrafluoro borate ion or triflluoro methanesulfonate ion; cyclooctadiene ligand can be substituted by ethylene or norbornadiene.
 
     The chiral phosphor nitrogen ligand contained in the above-mentioned iridium complex catalyst of the chiral phosphor nitrogen ligand has the following structural formula: 
     
       
                 
         
             
             
         
      
     
     wherein: m=0-3, n=0-4, p=0-6; R 3 , R 4  are H, C 1 -C 8  alkyl, halogenated alkyl, C 1 -C 8  alkoxy, C 2 -C 8  acyloxy, C 1 -C 8  acyl, C 2 -C 8  esteryl, (C 1 -C 8  acyl)amino, di (C 1 -C 8  alkyl)amino, halogen, phenyl, C 1 -C 8  alkyl-substituted phenyl, hydroxyl-substituted phenyl, C 1 -C 8  alkoxy-substituted phenyl, C 2 -C 8  acyloxy-substituted phenyl, halogenated phenyl, amino-substituted phenyl, (C 1 -C 8  acyl)amino-substituted phenyl, di (C 1 -C 8  alkyl)amino-substituted phenyl, C 1 -C 8  acyl-substituted phenyl, C 2 -C 8  esteryl-substituted phenyl, naphthyl, furyl, thienyl, respectively or combined alicyclic or aromatic ring when m, n, p≧2; R 3  and R 4  can be same or different; 
     R 5 , R 6 , R 7 , R 8  are H, C 1 -C 8  alkyl, halogenated alkyl, C 1 -C 8  alkoxy, C 2 -C 8  acyloxy, C 1 -C 8  acyl, C 2 -C 8  esteryl, (C 1 -C 8  acyl)amino, di (C 1 -C 8  alkyl)amino, halogen, phenyl, C 1 -C 8  alkyl-substituted phenyl, hydroxyl-substituted phenyl, C 1 -C 8  alkoxy-substituted phenyl, C 2 -C 8  acyloxy-substituted phenyl, halogenated phenyl, amino-substituted phenyl, (C 1 -C 8  acyl)amino-substituted phenyl, di (C 1 -C 8  alkyl)amino-substituted phenyl, C 1 -C 8  acyl-substituted phenyl, C 2 -C 8  esteryl-substituted phenyl, naphthyl, furyl, thienyl, respectively or R 5 ˜R 6 , R 7 ˜R 8  are combined alicyclic or aromatic ring; R 5 , R 6 , R 7 , R 8  can be same or different; 
     R 9 , R 10  are H, C 1 -C 8  alkyl, halogenated alkyl, C 1 -C 8  alkoxy, C 2 -C 8  acyloxy, C 1 -C 8  acyl, C 2 -C 8  esteryl, (C 1 -C 8  acyl)amino, di (C 1 -C 8  alkyl)amino, halogen, benzyl, phenyl, C 1 -C 8  alkyl-substituted phenyl, hydroxyl-substituted phenyl, C 1 -C 8  alkoxy-substituted phenyl, C 2 -C 8  acyloxy-substituted phenyl, halogenated phenyl, amino-substituted phenyl, (C 1 -C 8  acyl)amino-substituted phenyl, di (C 1 -C 8  alkyl)amino-substituted phenyl, C 1 -C 8  acyl-substituted phenyl, C 2 -C 8  esteryl-substituted phenyl, naphthyl, furyl, thienyl, respectively or R 9 ˜R 10  are combined alicyclic or aromatic ring; R 9  and R 10  can be same or different; 
     R 11  is C 1 -C 8  alkyl, phenyl, C 1 -C 8  alkyl-substituted phenyl, hydroxyl-substituted phenyl, sulfo-substituted phenyl, C 1 -C 8  alkoxy-substituted phenyl, C 2 -C 8  acyloxy-substituted phenyl, halogenated phenyl, amino-substituted phenyl, (C 1 ˜C 8  acyl)amino-substituted phenyl, di (C 1 -C 8  alkyl)amino-substituted phenyl, C 1 -C 8  acyl-substituted phenyl, C 2 -C 8  esteryl-substituted phenyl, naphthyl, furyl, thienyl; 
     the C 1 ˜C 8  alkyl is methyl, ethyl, n-propyl, isopropyl, cyclopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, cyclobutyl, pentyl, isoamyl, neopentyl, sec-pentyl, tert pentyl, cyclopentyl, n-hexyl, isohexyl, neohexyl, sec-hexyl, tert-hexyl, cyclohexyl, n-heptyl, isoheptyl, neoheptyl, sec-heptyl, tert-heptyl, cycloheptyl, n-octyl, isooctyl, neooctyl, sec-octyl, tert-octyl or cyclooctyl; 
     the C 1 -C 8  alkoxy is methoxy, ethoxy, n-propoxy, isopropoxy, cyclopropoxy, n-butoxy, isobutoxy, sec-butoxy, tert-butoxy, cyclobutoxy, n-pentyloxy, isopentyloxy, neopentyloxy, sec-pentyloxy, tert-pentyloxy, cyclopentyloxy, n-hexyloxy, isohexyloxy, neohexyloxy, sec-hexyloxy, tert-hexyloxy, cyclohexyloxy, n-heptyloxy, isoheptyloxy, neoheptyloxy, sec-heptyloxy, tert-heptyloxy, cycloheptyloxy, n-octyloxy, iso-octyloxy, neooctyloxy, sec-octyloxy, tert-octyloxy, cyclooctyloxy; 
     the C 1 -C 8  acyl is formoxyl, acetyl, propionyl, n-butyryl, isobutyryl, n-valeryl, isovaleryl, sec-valeryl, neovaleryl, n-hexanoyl, isohexanoyl, neohexanoyl, sec-hexanoyl, n-heptanoyl, isoheptanoyl, neoheptanoyl, sec-heptanoyl, n-octanoyl, isooctanoyl, neooctanoyl, sec-octanoyl, 1-cyclopropyl formoxyl, 1-cyclobutyl formoxyl, 1-cyclopentyl formoxyl, 1-cyclohexyl formoxyl, 1-cycloheptyl formoxyl; 
     the C 2 -C 8  acyloxy is acetoxyl, propionyloxy, n-butyryloxy, isobutyryloxy, n-valeryloxy, isovaleryloxy sec-valeryloxy, neovaleryloxy, n-hexanoyloxy, isohexanoyloxy, neohexanoyloxy, sec-hexanoyloxy, n-heptanoyloxy, isoheptanoyloxy, neoheptanoyloxy, sec-heptanoyloxy, n-octanoyloxy, isooctanoyloxy, neooctanoyloxy, sec-octanoyloxy, 1-cyclopropyl acetoxyl, 1-cyclobutyl acetoxyl, 1-cyclopentyl acetoxyl, 1-cyclohexyl acetoxyl, 1-cycloheptyl acetoxyl; 
     the C 2 -C 8  esteryl is methoxycarbonyl, ethoxycarbonyl, propoxycarbonyl, isopropoxycarbonyl, butoxycarbonyl, isobutoxycarbonyl, n-pentyloxycarbonyl, isopentyloxycarbonyl, neopentyloxycarbonyl, sec-pentyloxycarbonyl, tert-pentyloxycarbonyl, cyclopentyloxycarbonyl, n-hexyloxycarbonyl, isohexyloxycarbonyl, neohexyloxycarbonyl, sec-hexyloxycarbonyl, tert-hexyloxycarbonyl, cyclohexyloxycarbonyl, n-heptyloxycarbonyl, isoheptyloxycarbonyl, neoheptyloxycarbonyl, sec-heptyloxycarbonyl, tert-heptyloxycarbonyl, cycloheptyloxycarbonyl; 
     the halogenated alkyl is a halogenated alkyl containing fluoride, chlorine, bromine or iodine. 
     The preparation method of chiral carboxylic acids of the present invention is that: under the protection of argon or nitrogen, the catalyst and the substrate are added into the inner tube of the reactor, then the additive and the solvent are added, the reactor is sealed and the air in the reactor is replaced carefully with hydrogen for 3 to 5 times, after the reactor is filled with hydrogen to the desired pressure, the mixture is stirred to the end; 
     The solvent used is ethyl acetate or C 1 -C 6  alcohol; the amount of the catalyst is 0.001-1 mol %; the concentration of the substrate is 0.001-10.0 M; the additive is one or several of iodine, isopropylamine, tert-butylamine, dimethylamine, diethyl amine, diisopropylamine, diisopropyl ethylamine, trimethylamine, triethylamine, 1,8-diazabicyclo[5,4,0]undec-7-ene (DBU), 1,4-diazabicyclo[2,2,2]octane (DABCO), sodium hydride, sodium hydroxide, sodium carbonate, sodium bicarbonate, sodium tert-butyl alcohol, potassium hydroxide, potassium carbonate, potassium bicarbonate, potassium tert-butyl alcohol, cesium hydroxide, cesium carbonate; the reaction temperature is 0-100° C.; the hydrogen pressure, is 0.1-10 Mpa; the tri-substituted α,β-unsaturated carboxylic acid is stirred in the reactor to react for 0.5-0.48 h. 
     The present invention provides a successful application of iridium complex catalysts of chiral phosphor nitrogen ligands in asymmetric catalytic hydrogenation of tri-substituted α,β-unsaturated carboxylic acids. Very useful chiral carboxylic acids can be obtained by the asymmetric catalytic hydrogenation of tri-substituted α,β-unsaturated carboxylic acids, with the complexes of the chiral phosphor nitrogen ligands and iridium used as the catalysts which show high activity and enantioselectivity (up to 99.8% ee), thus the present invention provides a more efficient method with higher enantioselectivity for asymmetric catalytic hydrogenation of chiral carboxylic acid-like compounds, and has important application value to asymmetric hydrogenation of chiral carboxylic acids. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     The following embodiments will facilitate to further understand the present invention, but do not limit the contents of the present invention. The preparation method of the present invention can be shown further with the representative compounds as follows: 
     General explanation: 
     The following abbreviations are used in the embodiments, and their meanings are as follows: 
     Me is methyl,  ll Pr is n-propyl,  i Pr is isopropyl,  i Bu is isobutyl,  l Bu is tert-butyl, Ph is phenyl, Bn is benzyl, An is p-methoxyphenyl, Xyl is 3,5-dimethylphenyl, DMM is 3,5-dimethyl-4-methoxyphenyl, DTB is 3,5-di-tert-butyl-phenyl, BARF- is tetra (3,5-bis trifluoromethylphenyl) borate radical; PF 6   −  is hexafluoro phosphate ion, Naphthyl is naphthyl, Furan-2-yl is 2-furyl; NMR is nuclear magnetic resonance, the chiral SFC is a supercritical fluid chromatography equipped with a chiral column, the chiral HPLC is a high pressure liquid chromatography equipped with a chiral chromatographic column; the ee value is the excess value of enantiomer. 
     The solvents used are purified and dried with the standard operation before use; the reagents used are commercially available or synthesized according to the existing literature methods and purified before use. 
     Embodiment 1 
     Asymmetric Catalytic Hydrogenation of α-methyl Cinnamic Acid 
     
       
                 
         
             
             
         
      
     
     In the glove box, the catalyst (0.00125 mmol) and α-methyl cinnamic acid  1   a  (81 mg, 0.5 mmol) are weighted in the reaction inner tube with stirring bar, then the reaction inner tube is sealed for use. When the reaction inner tube is took out, the additive and the solvent are added, then the inner tube is placed into the hydrogenation reactor, the mixture is stirred under the hydrogen pressure of 0.6˜10 Mpa till the pressure stops declining. Then the stirring is stopped, the hydrogen is released. After the system is condensed by evaporating off rotatably, the system is adjusted pH&lt;3 with 3N hydrochloric acid water solution, extracted with diethyl ether (10 mL×3), and separated, the organic phase is collected, washed with saturated salt water, and dried with anhydrous sodium sulfate. The desiccant is removed by suction filtration, the solvent is evaporated off by rotating, then the object product  2   a  is obtained. The conversion rate is analyzed through  1 H NMR, after it is converted to amide, its ee value is analyzed through the chiral HPLC analysis. The experimental results obtained are shown in Table 1: 
     
       
         
               
             
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
             
           
               
                 TABLE 1 
               
             
             
               
                   
               
               
                 the experimental results of asymmetric catalytic hydrogenation of α-methyl cinnamic acid 1a 
               
             
          
           
               
                   
                 Hydrogen 
                   
                   
                   
                 Conversion  
                   
               
             
          
           
               
                   
                 Catalyst 
                 pressure 
                 Additive 
                 Solvent 
                 Temperature  
                 rate 
                 ee value 
               
               
                   
               
             
          
           
               
                 1 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 0.6 MPa 
                 Non 
                 methanol 
                 room temperature 
                 15% 
                 82% 
               
               
                   
               
               
                 2 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 0.6 MPa 
                 Non 
                 methanol 
                 room temperature 
                 0 
                   
               
               
                   
               
               
                 3 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 0.6 MPa 
                 Non 
                 methanol 
                 room temperature 
                 17% 
                 80% 
               
               
                   
               
               
                 4 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 0.6 MPa 
                 Non 
                 methanol 
                 room temperature 
                 18% 
                 65% 
               
               
                   
               
               
                 5 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 0.6 MPa 
                 Non 
                 methanol 
                 room temperature 
                 61% 
                 53% 
               
               
                   
               
               
                 6 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 0.6 MPa 
                 Non 
                 methanol 
                 room temperature 
                 16% 
                 85% 
               
               
                   
               
               
                 7 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 0.6 MPa 
                 Non 
                 methanol 
                 room temperature 
                 30% 
                 76% 
               
               
                   
               
               
                 8 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 0.6 MPa 
                 Non 
                 methanol 
                 room temperature 
                 25% 
                 72% 
               
               
                   
               
               
                 9 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 0.6 MPa 
                 Non 
                 methanol 
                 room temperature 
                 58% 
                 &gt;99%  
               
               
                   
               
               
                 10 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                   2 MPa 
                 Non 
                 methanol 
                 room temperature 
                 62% 
                 98% 
               
               
                   
               
               
                 11 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                   5 MPa 
                 Non 
                 methanol 
                 room temperature 
                 63% 
                 96% 
               
               
                   
               
               
                 12 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                  10 MPa 
                 Non 
                 methanol 
                 room temperature 
                 65% 
                 91% 
               
               
                   
               
               
                 13 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 0.6 MPa 
                 Non 
                 ethyl acetate 
                 room temperature 
                 45% 
                 86% 
               
               
                   
               
               
                 14 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 0.6 MPa 
                 Non 
                 dichloromethane 
                 room temperature 
                 0 
                   
               
               
                   
               
               
                 15 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 0.6 MPa 
                 Non 
                 diethyl ether 
                 room temperature 
                 0 
                   
               
               
                   
               
               
                 16 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 0.6 MPa 
                 Non 
                 tetrahydrofuran 
                 room temperature 
                 0 
                   
               
               
                   
               
               
                 17 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 0.6 MPa 
                 Non 
                 methylbenzene 
                 Room temperature 
                 0 
                   
               
               
                   
               
               
                 18 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 0.6 MPa 
                 Non 
                 methanol 
                 50° C. 
                 85% 
                 94% 
               
               
                   
               
               
                 19 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 0.6 MPa 
                 iodine 
                 methanol 
                 room temperature 
                 0 
                   
               
               
                   
               
               
                 20 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 0.6 MPa 
                 NaBARF3H 2 O 
                 methanol 
                 room temperature 
                 54% 
                 99% 
               
               
                   
               
               
                 21 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 0.6 MPa 
                 Triethylamine (0.05 mmol) 
                 methanol 
                             room temperature 
                 60% 
                 &gt;99%  
               
               
                   
               
               
                 22 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 0.6 MPa 
                 Triethylamine (0.1 mmol) 
                 methanol 
                 room temperature 
                 75% 
                 &gt;99%  
               
               
                   
               
               
                 23 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 0.6 MPa 
                 Triethylamine (0.25 mmol) 
                 methanol 
                 room temperature 
                 100%  
                 &gt;99%  
               
               
                   
               
               
                 24 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 0.6 MPa 
                 Triethylamine (0.5 mmol) 
                 methanol 
                 room temperature 
                 100%  
                 &gt;99%  
               
               
                   
               
               
                 25 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 0.6 MPa 
                 Triethylamine (0.25 mmol) 
                 ethanol 
                 room temperature 
                 95% 
                 &gt;99%  
               
               
                   
               
               
                 26 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 0.6 MPa 
                 Triethylamine (0.25 mmol) 
                 isopropanol 
                 room temperature 
                 100%  
                 99% 
               
               
                   
               
               
                 27 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 0.1 MPa 
                 Triethylamine (0.25 mmol) 
                 methanol 
                 room temperature 
                 100%  
                 &gt;99%  
               
               
                   
               
               
                 28 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 0.6 MPa 
                 Triethylamine (0.25 mmol) 
                 methanol 
                 room temperature 
                 100%  
                 96% 
               
               
                   
               
               
                 29 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 0.6 MPa 
                 Triethylamine (0.25 mmol) 
                 methanol 
                 room temperature 
                 100%  
                 &gt;99%  
               
               
                   
               
               
                 30 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 0.6 MPa 
                 Triethylamine (0.25 mmol) 
                 methanol 
                 room temperature 
                 100%  
                 &gt;99%  
               
               
                   
               
               
                 31 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 0.6 MPa 
                 Triethylamine (0.25 mmol) 
                 methanol 
                 room temperature 
                 100%  
                 &gt;99%  
               
               
                   
               
             
          
         
       
     
     Embodiment 2 
     Asymmetric Catalytic Hydrogenation of α-methyl Cinnamic Acid Derivatives 
     
       
                 
         
             
             
         
      
     
     In the glove box, the catalyst 
                                
(2.4 mg, 0.00125 mmol) and the substrate  1  (0.5 mmol) are weighted in the reaction inner tube with stirring bar, then the reaction inner tube is sealed for use. When the reaction inner tube is took out, triethylamine (35 μL, 0.25 mmol) and anhydrous methanol (2 mL) are added with a syringe, then the inner tube is placed into the hydrogenation reactor, the mixture is stirred under the hydrogen pressure of 0.6 MPa till the pressure stops declining. Then the stirring is stopped, the hydrogen is released. After the system is condensed by evaporating off rotatably, the system is adjusted pH&lt;3 with 3N hydrochloric acid water solution, extracted with diethyl ether (10 mL×3), and separated, the organic phase is collected, washed with saturated salt water, and dried with anhydrous sodium sulfate. The desiccant is removed by suction filtration, the solvent is evaporated off by rotating, then the object product  2  is obtained. The conversion rate is analyzed through  1 H NMR, after it is converted to amide, its ee value is analyzed through the chiral HPLC or SFC analysis. The experimental results obtained are shown in Table 2:
 
     
       
         
               
             
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
             
           
               
                 TABLE 2 
               
             
             
               
                   
               
               
                 the experimental results of asymmetric catalytic  
               
               
                 hydrogenation of α-substituted cinnamic acids 
               
             
          
           
               
                   
                   
                   
                   
                 Conversion  
                   
                   
               
               
                   
                   
                 R 1   
                 Ar 2   
                 rate 
                 Yield 
                 ee value 
               
               
                   
               
             
          
           
               
                   
                 1 
                 Me 
                 Ph 
                 100% 
                 99% 
                 &gt;99% 
               
               
                   
                 2 
                 Me 
                 2-MeC 6 H 4   
                 100% 
                 97% 
                   99% 
               
               
                   
                 3 
                 Me 
                 3-MeC 6 H 4   
                 100% 
                 98% 
                   99% 
               
               
                   
                 4 
                 Me 
                 4-MeC 6 H 4   
                 100% 
                 98% 
                 &gt;99% 
               
               
                   
                 5 
                 Me 
                 2-MeOC 6 H 4   
                 100% 
                 98% 
                   99% 
               
               
                   
                 6 
                 Me 
                 3-MeOC 6 H 4   
                 100% 
                 99% 
                   98% 
               
               
                   
                 7 
                 Me 
                 4-MeOC 6 H 4   
                 100% 
                 97% 
                   99% 
               
               
                   
                 8 
                 Me 
                 2-ClC 6 H 4   
                 100% 
                 97% 
                   96% 
               
               
                   
                 9 
                 Me 
                 3-ClC 6 H 4   
                 100% 
                 98% 
                   99% 
               
               
                   
                 10 
                 Me 
                 4-ClC 6 H 4   
                 100% 
                 97% 
                   98% 
               
               
                   
                 11 
                 Me 
                 3-BrC 6 H 4   
                 100% 
                 97% 
                   99% 
               
               
                   
                 12 
                 Me 
                 4-BrC 6 H 4   
                 100% 
                 97% 
                   98% 
               
               
                   
                 13 
                 Me 
                 4-CF 3 C 6 H 4   
                 100% 
                 98% 
                   97% 
               
               
                   
                 14 
                 Me 
                 2-Naphthyl 
                 100% 
                 96% 
                   99% 
               
               
                   
                 15 
                 Me 
                 Furan-2-yl 
                 100% 
                 98% 
                   98% 
               
               
                   
                 16 
                   i Pr 
                 Ph 
                 100% 
                 97% 
                   99% 
               
               
                   
               
             
          
         
       
     
     Embodiment 3 
     Asymmetric Catalytic Hydrogenation of Tiglic Acid 
     
       
                 
         
             
             
         
      
     
     In the glove box, the catalyst (0.00125 mmol) and tiglic acid  3   a  (50 mg, 0.5 mmol) are weighted in the reaction inner tube with stirring bar, then the reaction inner tube is sealed for use. When the reaction inner tube is took out, the additive and the solvent (2 mL) are added, then the inner tube is placed into the hydrogenation reactor, the mixture is stirred under the hydrogen pressure of 0.6 MPa till the pressure stops declining. Then the stirring is stopped, the hydrogen is released. After the system is condensed by evaporating off rotatably, the system is adjusted pH&lt;3 with 3N hydrochloric acid water solution, extracted with diethyl ether (10 mL×3), and separated, the organic phase is collected, washed with saturated salt water, and dried with anhydrous sodium sulfate. The desiccant is removed by suction filtration, the solvent is evaporated off by rotating, then the object product  4   a  is obtained. The conversion rate is analyzed through  1 H NMR, after it is converted to amide, its ee value is analyzed through the chiral HPLC or SFC analysis. The experimental results obtained are shown in Table 3: 
     
       
         
               
             
               
               
               
               
               
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 3 
               
             
             
               
                   
               
               
                 the experimental results of asymmetric catalytic hydrogenation of tiglic acid 
               
             
          
           
               
                   
                 Catalyst 
                 Additive 
                 Solvent 
                 Conversion rate 
                 ee value 
               
               
                   
               
             
          
           
               
                 1 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 triethylamine (0.25 mmol) 
                 methanol 
                 95% 
                 97% 
               
               
                   
               
               
                 2 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 triethylamine (0.25 mmol) 
                 methanol 
                 100%  
                 94% 
               
               
                   
               
               
                 3 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 triethylamine (0.25 mmol) 
                 methanol 
                 90% 
                 98% 
               
               
                   
               
               
                 4 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 triethylamine (0.25 mmol) 
                 methanol 
                 95% 
                 97% 
               
               
                   
               
               
                 5 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 pyridine (0.25 mmol) 
                 methanol 
                 0 
                 — 
               
               
                   
               
               
                 6 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 diisopropyl ethylamine (0.25 mmol) 
                 methanol 
                 95% 
                 99% 
               
               
                   
               
               
                 7 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 diisopropyl amine (0.25 mmol) 
                 methanol 
                 95% 
                 99% 
               
               
                   
               
               
                 8 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 potassium hydroxide (025 mmol) 
                 methanol 
                 95% 
                 98% 
               
               
                   
               
               
                 9 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 potassium acetate (0.25 mmol) 
                 methanol 
                 80% 
                 96% 
               
               
                   
               
               
                 10 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 potassium bicarbonate (0.25 mmol) 
                 methanol 
                 85% 
                 98% 
               
               
                   
               
               
                 11 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 potassium carbonate (0.25 mmol) 
                 methanol 
                 100%  
                 99% 
               
               
                   
               
               
                 12 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 sodium carbonate (0.25 mmol) 
                 methanol 
                 100%  
                 98% 
               
               
                   
               
               
                 13 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 cesium carbonate (025 mmol) 
                 methanol 
                 100%  
                 &gt;99%  
               
               
                   
               
               
                 14 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 cesium carbonate (0.25 mmol) 
                 ethanol 
                 90% 
                 98% 
               
               
                   
               
               
                 15 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 cesium carbonate (0.25 mmol) 
                 isopropanol 
                 80% 
                 98% 
               
               
                   
               
             
          
         
       
     
     Embodiment 4 
     Asymmetric Catalytic Hydrogenation of Tiglic Acid Derivatives 
     
       
                 
         
             
             
         
      
     
     In the glove box, the catalyst 
                                
(2.4 mg, 0.00125 mmol), the substrate  3  (0.5 mmol) and cesium carbonate (82 mg, 0.25 mmol) are weighted in the reaction inner tube with stirring bar, then the reaction inner tube is sealed for use. When the reaction inner tube is took out, anhydrous methanol (2 mL) is added with a syringe, then the inner tube is placed into the hydrogenation reactor, the mixture is stirred under the hydrogen pressure of 0.6 MPa till the pressure stops declining. Then the stirring is stopped, the hydrogen is released. After the system is condensed by evaporating off rotatably, the system is adjusted pH&lt;3 with 3N hydrochloric acid water solution, extracted with diethyl ether (10 mL×3), and separated, the organic phase is collected, washed with saturated salt water, and dried with anhydrous sodium sulfate. The desiccant is removed by suction filtration, the solvent is evaporated off by rotating, then the object product is obtained. The conversion rate is analyzed through  1 H NMR, after it is converted to amide, its ee value is analyzed through the chiral HPLC or SFC analysis. The experimental results obtained are shown in Table 4:
 
     
       
         
               
             
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
             
           
               
                 TABLE 4 
               
             
             
               
                   
               
               
                 the experimental results of asymmetric catalytic  
               
               
                 hydrogenation of tiglic acid derivatives 
               
             
          
           
               
                   
                   
                 R 1   
                 R 2   
                 Conversion rate 
                 Yield 
                 ee value 
               
               
                   
                   
               
             
          
           
               
                   
                 1 
                 Me 
                 Me 
                 100% 
                 92% 
                 99.1% 
               
               
                   
                 2 
                 Me 
                 Et 
                 100% 
                 93% 
                   98% 
               
               
                   
                 3 
                 Me 
                 ″Pr 
                 100% 
                 89% 
                   99% 
               
               
                   
                 4 
                 Me 
                   i Bu 
                 100% 
                 97% 
                   90% 
               
               
                   
                 5 
                 Et 
                 ″Pr 
                 100% 
                 89% 
                 99.4% 
               
               
                   
                 6 
                 ″Pr 
                 Me 
                 100% 
                 92% 
                   98% 
               
               
                   
                   
               
             
          
         
       
     
     Embodiment 5 
     Asymmetric Catalytic Hydrogenation of (E)-2-[3-(3-methoxy-propoxy)-4-methoxy phenyl methylene]-3-methyl-butyric Acid 
     
       
                 
         
             
             
         
      
     
     In the glove box, the catalyst (0.0025 mmol) and (E)-2-[3-(3-methoxy-propoxy)-4-methoxy phenyl methylene]-3-methyl-butyric acid  5  (77.1 mg, 0.25 mmol) are weighted in the reaction inner tube with stirring bar, then the reaction inner tube is sealed for use. When the reaction inner tube is took out, triethylamine (12.6 mg, 0.125 mmol) and anhydrous methanol (2 mL) are added with a syringe, then the inner tube is placed into the hydrogenation reactor, the mixture is stirred at the room temperature under the hydrogen pressure of 0.6 MPa for 24 h. Then the stirring is stopped, the hydrogen is released. After the system is condensed by evaporating off rotatably, the system is adjusted pH&lt;3 with 3N hydrochloric acid water solution, extracted with diethyl ether (10 mL×3), and separated, the organic phase is collected, washed with saturated salt water, and dried with anhydrous sodium sulfate. The desiccant is removed by suction filtration, the solvent is evaporated off by rotating, then the object product  6  is obtained. The conversion rate is analyzed through  1 H NMR, after it is converted to amide, its ee value is analyzed through the chiral HPLC or SFC analysis. The experimental results obtained are shown in Table 5: 
     
       
         
               
             
               
               
               
               
               
             
           
               
                 TABLE 5 
               
             
             
               
                   
               
               
                 the experimental results of asymmetric catalytic hydrogenation of (E)-2-[3-(3- 
               
               
                 methoxy-propoxy)-4-methoxy phenyl methylene]-3-methyl-butyric acid 
               
             
          
           
               
                   
                 Catalyst 
                 Conversion rate 
                 Yield 
                 ee value 
               
               
                   
               
               
                 1 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 100% 
                 94% 
                 98% 
               
               
                   
               
               
                 2 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                  80% 
                 70% 
                 95% 
               
               
                   
               
               
                 3 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 100% 
                 93% 
                 98% 
               
               
                   
               
               
                 4 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 100% 
                 95% 
                 98% 
               
               
                   
               
               
                 5 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 100% 
                 95% 
                 98% 
               
               
                   
               
               
                 6 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                  9% 
                 — 
                 — 
               
               
                   
               
               
                 7 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                  48% 
                 30% 
                 91% 
               
               
                   
               
             
          
         
       
     
     Embodiment 6 
     Asymmetric Catalytic Hydrogenation of (R)-2-[3-(3-methoxy-propoxy)-4-methoxy phenyl methylene]-3-methyl-butyric Acid 
     
       
                 
         
             
             
         
      
     
     In the glove box, the catalyst 
                                
(0.8 mg, 0.417 μmol) and (E)-2-[3-(3-methoxy-propoxy)-4-methoxy phenyl methylene]-3-methyl-butyric acid  5  (771 mg, 2.5 mmol) are weighted in the reaction inner tube with stirring bar, then the reaction inner tube is sealed for use. When the reaction inner tube is took out, triethylamine (1.26 g, 12.5 mmol) and anhydrous methanol (3.5 mL) are added with a syringe, then the inner tube is placed into the hydrogenation reactor, the mixture is stirred in 70° C. oil bath under the hydrogen pressure of 1.2 MPa for 7 h. Then the stirring is stopped, the hydrogen is released. After the system is condensed by evaporating off rotatably, the system is adjusted pH&lt;3 with 3N hydrochloric acid water solution, extracted with diethyl ether (50 mL×3), and separated, the organic phase is collected, washed with saturated salt water, and dried with anhydrous sodium sulfate. The desiccant is removed by suction filtration, the solvent is evaporated off by rotating, then the object product (R)-6 is obtained, and is a white solid, through the  1 H NMR analysis, the conversion rate is 100% and the yield is 96%. Mp 44-45° C.; [α] D   21 ÷42.2 (c 1.0, CH 2 Cl 2 );  1 H NMR (400 MHz, CDCl 3 ): δ 9.71 (brs, 1H, COOH), 6.73-6.68 (m, 3H, Ar—H), 4.06 (t, J=6.4 Hz, 2H, CH 2 ), 3.79 (s, 3H, CH 3 ), 3.53 (t, J=6.4 Hz, 2H, CH 2 ), 3.32 (s, 3H, CH 3 ), 2.81-2.71 (m, 2H, CH 2  and CH), 2.43-2.38 (m, 1H, CH 2 ), 2.08-2.01 (m, 2H, CH 2 ), 1.90 (sextet, J=6.4 Hz, 1H, CH), 1.00 (dd, J=13.2 and 6.8 Hz, 6H, CH 3 ); after it is converted to methyl ester, its ee value is 98% through the chiral SFC analysis. Under the same condition, the amount of the catalyst is further reduced to 0.01 mol %, the reaction lasts for 18 h, then the conversion rate is 97%, the yield is 95%, and the ee value is 95%.
 
     Embodiment 7 
     Asymmetric Catalytic Hydrogenation of α-methoxy Cinnamic Acid 
     
       
                 
         
             
             
         
      
     
     In the glove box, the catalyst (0.00125 mmol) and α-methoxy cinnamic acid  7   a  (89 mg, 0.5 mmol) are weighted in the reaction inner tube with stirring bar, then the reaction inner tube is sealed for use. When the reaction inner tube is took out, the additive and the solvent (2 mL) are added with a syringe, then the inner tube is placed into the hydrogenation reactor, the mixture is stirred at the room temperature under the hydrogen pressure of 0.6 MPa till the pressure stops declining. Then the stirring is stopped, the hydrogen is released. After the system is condensed by evaporating off rotatably, the system is adjusted pH&lt;3 with 3N hydrochloric acid water solution, extracted with diethyl ether (10 mL×3), and separated, the organic phase is collected, washed with saturated salt water, and dried with anhydrous sodium sulfate. The desiccant is removed by suction filtration, the solvent is evaporated off by rotating, then the object product  8   a  is obtained. The conversion rate is analyzed through  1 H NMR, after it is converted to amide, its ee value is analyzed through the chiral HPLC or SFC analysis. The experimental results obtained are shown in Table 6: 
     
       
         
               
             
               
               
               
               
               
             
           
               
                 TABLE 6 
               
             
             
               
                   
               
               
                 the experimental results of asymmetric catalytic hydrogenation of α-methoxy cinnamic acid 
               
             
          
           
               
                   
                 Catalyst 
                 Additive 
                 Conversion rate 
                 ee value 
               
               
                   
               
               
                 1 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 triethylamine (0.25 mmol) 
                 95% 
                 99.5% 
               
               
                   
               
               
                 2 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 triethylamine (0.25 mmol) 
                 90% 
                 99.8% 
               
               
                   
               
               
                 3 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 triethylamine (0.25 mmol) 
                 95% 
                 99.5% 
               
               
                   
               
               
                 4 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 triethylamine (0.25 mmol) 
                 95% 
                 99.5% 
               
               
                   
               
               
                 5 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 cesium carbonate (0.25 mmol) 
                 100%  
                 99.3% 
               
               
                   
               
             
          
         
       
     
     Embodiment 8 
     Asymmetric Catalytic Hydrogenation of α-methoxy Cinnamic Acid Derivatives 
     
       
                 
         
             
             
         
      
     
     In the glove box, the catalyst 
                                
(2.4 mg, 0.00125 mmol), the reaction substrate  7  (0.5 mmol) and cesium carbonate (82 mg, 0.25 mmol) are weighted in the reaction inner tube with stirring bar, then the reaction inner tube is sealed for use. When the reaction inner tube is took out, anhydrous methanol (2 mL) is added with a syringe, then the inner tube is placed into the hydrogenation reactor, the mixture is stirred at the room temperature under the hydrogen pressure of 0.6 MPa till the pressure stops declining. Then the stirring is stopped, the hydrogen is released. After the system is condensed by evaporating off rotatably, the system is adjusted pH&lt;3 with 3N hydrochloric acid water solution, extracted with diethyl ether (10 mL×3), and separated, the organic phase is collected, washed with saturated salt water, and dried with anhydrous sodium sulfate. The desiccant is removed by suction filtration, the solvent is evaporated off by rotating, then the object product  8  is obtained. The conversion rate is analyzed through  1 H NMR, after it is converted to amide, its ee value is analyzed through the chiral SFC analysis. The experimental results obtained are shown in Table 7:
 
     
       
         
               
             
               
               
               
               
               
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 7 
               
             
             
               
                   
               
               
                 the experimental results of asymmetric catalytic hydrogenation 
               
               
                 of α- methoxy cinnamic acid derivatives 
               
             
          
           
               
                   
                 R 1   
                 Ar 2   
                 Conversion rate 
                 Yield 
                 ee value 
               
               
                   
               
             
          
           
               
                 1 
                 Me 
                 Ph 
                 100% 
                 95% 
                 99.3% 
               
               
                 2 
                 Me 
                 o-Tol 
                 100% 
                 93% 
                 99.7% 
               
               
                 3 
                 Me 
                 m-Tol 
                 100% 
                 91% 
                 99.0% 
               
               
                 4 
                 Me 
                 p-Tol 
                 100% 
                 94% 
                 99.6% 
               
               
                 5 
                 Me 
                 o-MeOPh 
                 100% 
                 97% 
                 99.2% 
               
               
                 6 
                 Me 
                 m-MeOPh 
                 100% 
                 91% 
                 99.7% 
               
               
                 7 
                 Me 
                 p-MeOPh 
                 100% 
                 92% 
                 99.7% 
               
               
                 8 
                 Me 
                 o-ClPh 
                 100% 
                 95% 
                 99.4% 
               
               
                 9 
                 Me 
                 m-ClPh 
                 100% 
                 93% 
                 99.3% 
               
               
                 10 
                 Me 
                 p-ClPh 
                 100% 
                 91% 
                 99.8% 
               
               
                 11 
                 Me 
                 o-BrPh 
                 100% 
                 91% 
                 99.5% 
               
               
                 12 
                 Me 
                 m-BrPh 
                 100% 
                 94% 
                 99.6% 
               
               
                 13 
                 Me 
                 p-NO 2 Ph 
                 100% 
                 96% 
                 99.7% 
               
               
                 14 
                 Me 
                 p-CF 3 Ph 
                 100% 
                 95% 
                 99.2% 
               
               
                 15 
                 Me 
                 2-naphthyl 
                 100% 
                 93% 
                 99.8% 
               
               
                 16 
                 Et 
                 Ph 
                 100% 
                 92% 
                 99.7% 
               
               
                 17 
                 Et 
                 p-BnOPh 
                 100% 
                 93% 
                 99.5% 
               
               
                 18 
                 Bn 
                 Ph 
                 100% 
                 94% 
                 99.5% 
               
               
                 19 
                 Bn 
                 o-Tol 
                 100% 
                 93% 
                 99.8% 
               
               
                 20  
                 Bn 
                 m-Tol 
                 100% 
                 94% 
                 99.8% 
               
               
                 21  
                 Bn 
                 p-Tol 
                 100% 
                 91% 
                 99.8% 
               
               
                 22  
                 Bn 
                 o-MeOPh  
                 100% 
                 93% 
                 99.4% 
               
               
                 23 
                 Bn  
                 m-MeOPh 
                 100% 
                 95% 
                 99.4% 
               
               
                 24 
                 Bn 
                 p-MeOPh  
                 100% 
                 93% 
                 99.6% 
               
               
                   
               
             
          
         
       
     
     Embodiment 9 
     Asymmetric Catalytic Hydrogenation of α-phenoxy-2-butenoic Acid 
     
       
                 
         
             
             
         
      
     
     In the glove box, the catalyst (0.0025 mmol) and α-phenoxy-2-butenoic acid  9   a  (89 mg, 0.5 mmol) are weighted in the reaction inner tube with stirring bar, then the reaction inner tube is sealed for use. When the reaction inner tube is took out, the additive and the solvent (2 mL) are added with a syringe, then the inner tube is placed into the hydrogenation reactor, the mixture is stirred under the hydrogen pressure of 0.6 MPa till the pressure stops declining. Then the stirring is stopped, the hydrogen is released. After the system is condensed by evaporating off rotatably, the system is adjusted pH&lt;3 with 3N hydrochloric acid water solution, extracted with diethyl ether (10 mL×3), and separated, the organic phase is collected, washed with saturated salt water, and dried with anhydrous sodium sulfate. The desiccant is removed by suction filtration, the solvent is evaporated off by rotating, then the object product  10   a  is obtained. The conversion rate is analyzed through  1 H NMR, after it is converted to amide, its ee value is analyzed through the chiral HPLC or SFC analysis. The experimental results obtained are shown in Table 8: 
     
       
         
               
             
               
               
               
               
               
               
               
             
           
               
                 TABLE 8 
               
             
             
               
                   
               
               
                 the experimental results of asymmetric catalytic hydrogenation of α-phenoxy-2-butenoic acid 
               
             
          
           
               
                   
                 Catalyst 
                 Additive 
                 Solvent 
                 Temperature  
                 Conversion rate 
                 ee value 
               
               
                   
               
               
                 1 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 triethylamine (0.25 mmol) 
                 methanol 
                 room temperature 
                 32% 
                 98% 
               
               
                   
               
               
                 2 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 triethylamine (0.25 mmol) 
                 methanol 
                 room temperature 
                 22% 
                 90% 
               
               
                   
               
               
                 3 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 triethylamine (0.25 mmol) 
                 methanol 
                 room temperature 
                 26% 
                 99% 
               
               
                   
               
               
                 4 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 triethylamine (0.25 mmol) 
                 methanol 
                 room temperature 
                 28% 
                 98% 
               
               
                   
               
               
                 5 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 triethylamine (0.25 mmol) 
                 methanol 
                 room temperature 
                 10% 
                 95% 
               
               
                   
               
               
                 6 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 cesium carbonate (0.25 mmol)  
                 methanol 
                 room temperature 
                 93% 
                 98% 
               
               
                   
               
               
                 7 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 cesium carbonate (0.25 mmol) 
                 ethanol 
                 room temperature 
                 95% 
                 98% 
               
               
                   
               
               
                 8 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 cesium carbonate (0.25 mmol) 
                 isopropanol 
                 room temperature 
                 56% 
                 98% 
               
               
                   
               
               
                 9 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 cesium carbonate (0.25 mmol)  
                 methanol 
                 40° C. 
                 100%  
                 99% 
               
               
                   
               
             
          
         
       
     
     Embodiment 10 
     Asymmetric Catalytic Hydrogenation of α-phenoxy-2-butenoic Acid Derivatives 
     
       
                 
         
             
             
         
      
     
     In the glove box, the catalyst 
                                
(4.8 mg, 0.0025 mmol), the reaction substrate  9  (0.5 mmol) and cesium carbonate (82 mg, 0.25 mmol) are weighted in the reaction inner tube with stirring bar, then the reaction inner tube is sealed for use. When the reaction inner tube is took out, anhydrous methanol (2 mL) is added with a syringe, then the inner tube is placed into the hydrogenation reactor, the mixture is stirred in 40° C. water bath under the hydrogen pressure of 0.6 MPa till the pressure stops declining. Then the stirring is stopped, the hydrogen is released. After the system is condensed by evaporating off rotatably, the system is adjusted pH&lt;3 with 3N hydrochloric acid water solution, extracted with diethyl ether (10 mL×3), and separated, the organic phase is collected, washed with saturated salt water, and dried with anhydrous sodium sulfate. The desiccant is removed by suction filtration, the solvent is evaporated off by rotating, then the object product  10  is obtained. The conversion rate is analyzed through  1 H NMR, after it is converted to amide, its ee value is analyzed through the chiral HPLC or SFC analysis. The experimental results obtained are shown in Table 9:
 
     
       
         
               
             
               
               
               
               
               
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 9 
               
             
             
               
                   
               
               
                 the experimental results of asymmetric catalytic  
               
               
                 hydrogenation of α- phenoxy -2- butenoic acid derivatives 
               
             
          
           
               
                   
                 Ar 1   
                 R 2   
                 Conversion rate 
                 Yield 
                 ee value 
               
               
                   
               
             
          
           
               
                 1 
                 Ph 
                 Me 
                 100% 
                 95% 
                   99% 
               
               
                 2 
                 m-Tol 
                 Me 
                 100% 
                 93% 
                   98% 
               
               
                 3 
                 m-BrPh 
                 Me 
                 100% 
                 91% 
                   96% 
               
               
                 4 
                 p-Tol 
                 Me 
                 100% 
                 92% 
                 &gt;99% 
               
               
                 5 
                 p- t BuPh 
                 Me 
                 100% 
                 94% 
                   97% 
               
               
                 6 
                 p-MeOPh 
                 Me 
                 100% 
                 93% 
                 &gt;99% 
               
               
                 7 
                 p-ClPh 
                 Me 
                 100% 
                 92% 
                   98% 
               
               
                 8 
                 p-BrPh 
                 Me 
                 100% 
                 93% 
                   97% 
               
               
                 9 
                 3,5-F 2 Ph 
                 Me 
                 100% 
                 88% 
                   89% 
               
               
                 10 
                 2-naphthyl 
                 Me 
                 100% 
                 94% 
                   97% 
               
               
                   
               
             
          
         
       
     
     Embodiment 11 
     Asymmetric Catalytic Hydrogenation of α-phenoxy Cinnamic Acid and Derivatives Thereof 
     
       
                 
         
             
             
         
      
     
     In the glove box, the catalyst 
                                
(4.8 mg, 0.0025 mmol), the reaction substrate  11  (0.5 mmol) and cesium carbonate (82 mg, 0.25 mmol) are weighted in the reaction inner tube with stirring bar, then the reaction inner tube is sealed for use. When the reaction inner tube is took out, anhydrous methanol (2 mL) is added with a syringe, then the inner tube is placed into the hydrogenation reactor, the mixture is stirred in 40° C. water bath under the hydrogen pressure of 0.6 MPa till the pressure stops declining. Then the stirring is stopped, the hydrogen is released. After the system is condensed by evaporating off rotatably, the system is adjusted pH&lt;3 with 3N hydrochloric acid water solution, extracted with diethyl ether (10 mL×3), and separated, the organic phase is collected, washed with saturated salt water, and dried with anhydrous sodium sulfate. The desiccant is removed by suction filtration, the solvent is evaporated off by rotating, then the object product  12  is obtained. The conversion rate is analyzed through  1 H NMR, after it is converted to amide, its ee value is analyzed through the chiral HPLC or SFC analysis. The experimental results obtained are shown in Table 10:
 
     
       
         
               
             
               
               
               
               
               
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 10 
               
             
             
               
                   
               
               
                 the experimental results of asymmetric catalytic hydrogenation  
               
               
                 of α- phenoxy cinnamic acid and derivatives thereof 
               
             
          
           
               
                   
                 Ar 1   
                 Ar 2   
                 Conversion rate 
                 Yield 
                 ee value 
               
               
                   
               
             
          
           
               
                 1 
                 Ph 
                 Ph 
                 100% 
                 95% 
                 99.6% 
               
               
                 2 
                 Ph 
                 m-Tol 
                 100% 
                 91% 
                 99.7% 
               
               
                 3 
                 Ph 
                 p-Tol 
                 100% 
                 94% 
                 99.8% 
               
               
                 4 
                 Ph 
                 o-MeOPh 
                 100% 
                 98% 
                   97% 
               
               
                 5 
                 Ph 
                 m-MeOPh 
                 100% 
                 96% 
                 99.6% 
               
               
                 6 
                 Ph 
                 p-MeOPh 
                 100% 
                 91% 
                 99.4% 
               
               
                 7 
                 Ph 
                 m-ClPh 
                 100% 
                 90% 
                 99.8% 
               
               
                 8 
                 Ph 
                 p-ClPh 
                 100% 
                 87% 
                 99.7% 
               
               
                 9 
                 Ph 
                 p-FPh 
                 100% 
                 93% 
                   99% 
               
               
                 10 
                 Ph 
                 o-CF 3 Ph 
                 100% 
                 91% 
                 99.8% 
               
               
                 11 
                 Ph 
                 m-CF 3 Ph 
                 100% 
                 92% 
                 99.7% 
               
               
                 12 
                 Ph 
                 p-CF 3 Ph 
                 100% 
                 93% 
                   99% 
               
               
                 13 
                 Ph 
                 1-naphthyl 
                 100% 
                 98% 
                 99.4% 
               
               
                 14 
                 Ph 
                 2-naphthyl 
                 100% 
                 92% 
                 99.2% 
               
               
                 15 
                 Ph 
                 furyl 
                 100% 
                 94% 
                   99% 
               
               
                 16 
                 o-Tol 
                 Ph 
                 100% 
                 89% 
                 99.5% 
               
               
                 17 
                 m-Tol 
                 Ph 
                 100% 
                 92% 
                 99.5% 
               
               
                 18 
                 p-Tol 
                 Ph 
                 100% 
                 91% 
                 99.5% 
               
               
                 19 
                 p-MeOPh 
                 Ph 
                 100% 
                 94% 
                 99.8% 
               
               
                 20 
                 p-ClPh 
                 Ph 
                 100% 
                 93% 
                 99.1% 
               
               
                   
               
             
          
         
       
     
     Embodiment 12 
     Asymmetric Catalytic Hydrogenation of α-phenyl Cinnamic Acid 
     
       
                 
         
             
             
         
      
     
     In the glove box, the catalyst (0.0025 mmol), α-phenyl cinnamic acid  13  (56 mg, 0.25 mmol) and cesium carbonate (41 mg, 0.125 mmol) are weighted in the reaction inner tube with stirring bar, then the reaction inner tube is sealed for use. When the reaction inner tube is took out, anhydrous methanol (2 mL) is added with a syringe, then the inner tube is placed into the hydrogenation reactor, the mixture is stirred at the room temperature under the hydrogen pressure of 0.6 MPa till the pressure stops declining. Then the stirring is stopped, the hydrogen is released. After the system is condensed by evaporating off rotatably, the system is adjusted pH&lt;3 with 3N hydrochloric acid water solution, extracted with diethyl ether (10 mL×3), and separated, the organic phase is collected, washed with saturated salt water, and dried with anhydrous sodium sulfate. The desiccant is removed by suction filtration, the solvent is evaporated off by rotating, then the object product  14  is obtained. The conversion rate is analyzed through  1 H NMR, after it is converted to amide, its ee value is analyzed through the chiral HPLC or SFC analysis. The experimental results obtained are shown in Table 11: 
     
       
         
               
             
               
               
               
               
             
           
               
                 TABLE 11 
               
             
             
               
                   
               
               
                 the experimental results of asymmetric catalytic hydrogenation of  
               
               
                 α-phenyl cinnamic acid 
               
             
          
           
               
                   
                   
                 Conver- 
                 ee 
               
               
                   
                 Catalyst 
                 sion rate 
                 value 
               
               
                   
               
               
                 1 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 100% 
                 91% 
               
               
                   
               
               
                 2 
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 100% 
                 93%