Azzindani/Open_Reaction_Data huggingface dataset:
Reaction SMILES: [O:1]1[C:5]2[CH:6]=[CH:7][C:8]([CH:10]([C:16]#[N:17])[C:11](OCC)=[O:12])=[CH:9][C:4]=2[O:3][CH2:2]1.Cl.[CH2:19]([NH:26][NH2:27])[C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1>C(O)C.C(N(CC)CC)C>[NH2:17][C:16]1[N:26]([CH2:19][C:20]2[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=2)[N:27]=[C:11]([OH:12])[C:10]=1[C:8]1[CH:7]=[CH:6][C:5]2[O:1][CH2:2][O:3][C:4]=2[CH:9]=1
Reactant: NNCc1ccccc1
Reactant: CCOC(=O)C(C#N)c1ccc2c(c1)OCO2
Agent: Cl
Solvent: CCO
Solvent: CCN(CC)CC
Product: Nc1c(-c2ccc3c(c2)OCO3)c(O)nn1Cc1ccccc1
Yield: 40.7 %

Procedure:
To a stirred suspension of ethyl 2-(1,3-benzodioxol-5-yl)-2-cyanoacetate (76 g) and benzylhydrazine hydrochloride (99 g) in ethanol (1300 ml), triethylamine (152 ml) was slowly added at room temperature. The solution was refluxed for two days, then concentrated under reduced pressure. To the dark residue, ethyl acetate (800 ml) and water (1000 ml) were added. The white precipitate was collected by filtration washed with water and ethyl acetate, then dried under educed pressure to give the title compound as a white solid (41 g).
Reaction SMILES: Br[C:2]1[C:3]([NH2:10])=[N:4][C:5]([CH3:9])=[C:6]([Cl:8])[CH:7]=1.[Li]CCCC.[CH3:16][S:17]SC.O>O1CCCC1>[Cl:8][C:6]1[CH:7]=[C:2]([S:17][CH3:16])[C:3]([NH2:10])=[N:4][C:5]=1[CH3:9]
Reactant: CSSC
Reactant: Cc1nc(N)c(Br)cc1Cl
Agent: [Li]CCCC
Solvent: O
Solvent: C1CCOC1
Product: CSc1cc(Cl)c(C)nc1N
Temperature: 25 °C
Reaction time: 0.17 h
Yield: 62 %

Procedure:
3-Bromo-5-chloro-6-methylpyridin-2-amine (300 mg, 1.35 mmol, Eq: 1.00) was dissolved in tetrahydrofuran (5 ml). 1.6M n-BuLi in hexanes (3.39 ml, 5.42 mmol, Eq: 4) was added at −78° C. The mixture was stirred for 10 min. 1,2-Dimethyldisulfane (510 mg, 481 μl, 5.42 mmol, Eq: 4) was added and mixture allowed to warm to room temperature. The mixture was stirred for 30 min. Water was added and the mixture was extracted with dichloromethane. The combined organic layers were dried over sodium sulfate and concentrated to an oil. The product (158 mg, 61.8%) was obtained as a light yellow solid by chromatography (SiO2, ethyl acetate/n-heptane). MS: m/z=230.1 (M+acetonitrile+H+)
Reaction SMILES: [NH:1]1[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[C:3]2([C:13]3=[CH:14][C:15]4[O:19][CH2:18][O:17][C:16]=4[CH:20]=[C:12]3[O:11][CH2:10]2)[C:2]1=[O:21].BrC1C=CC=C2C=1C1(C3=CC4OCOC=4C=C3OC1)C(=O)N2.[CH3:44][S:45](Cl)(=[O:47])=[O:46].BrCC1OC(C(F)(F)F)=CC=1>>[CH3:44][S:45]([N:1]1[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[C:3]2([C:13]3=[CH:14][C:15]4[O:19][CH2:18][O:17][C:16]=4[CH:20]=[C:12]3[O:11][CH2:10]2)[C:2]1=[O:21])(=[O:47])=[O:46]
Reactant: O=C1Nc2ccccc2C12COc1cc3c(cc12)OCO3
Reactant: CS(=O)(=O)Cl
Agent: FC(F)(F)c1ccc(CBr)o1
Agent: O=C1Nc2cccc(Br)c2C12COc1cc3c(cc12)OCO3
Product: CS(=O)(=O)N1C(=O)C2(COc3cc4c(cc32)OCO4)c2ccccc21

Procedure:
Following the procedure described in EXAMPLE 10.47, and making non-critical variations using spiro[furo[2,3-f][1,3]benzodioxole-7,3′-indol]-2′(1′H)-one to replace 4′-bromospiro[furo[2,3-f][1,3]benzodioxole-7,3′-indol]-2′(1′H)-one, and methanesulfonyl chloride to replace 2-(bromomethyl)-5-(trifluoromethyl)furan, the title compound was obtained (51%) as a white solid: mp 215-217° C.; 1H NMR (300 MHz, CDCl3) δ 7.83 (d, 1H), 7.42-7.31 (m, 1H), 7.25-7.17 (m, 2H), 6.52 (s, 1H), 6.20 (s, 1H), 5.93-5.87 (m, 2H), 4.98 (d, 1H), 4.68 (d, 1H), 3.46 (s, 3H); 13C NMR (75 MHz, CDCl3) δ 176.9, 155.8, 149.5, 142.7, 138.1, 130.5, 129.7, 125.9, 124.3, 118.5, 113.8, 102.9, 101.8, 93.8, 80.6, 58.8, 41.8; MS (ES+) m/z 360 (M+1), 382 (M+23).
Reaction SMILES: [CH2:1]([C:3]1[CH:8]=[CH:7][C:6]([C:9]2[S:10][C:11]([CH3:20])=[C:12]([C:16]([F:19])([F:18])[F:17])[C:13]=2[CH2:14][OH:15])=[CH:5][CH:4]=1)[CH3:2].O[C:22]1[CH:27]=[CH:26][C:25]([CH2:28][CH2:29][C:30]([O:32]CC)=[O:31])=[C:24]([CH3:35])[C:23]=1[CH3:36].C(C1C=CC(C2SC(C)=C(C(F)(F)F)C=2COC2C(F)=CC(CCC(OCC)=O)=CC=2F)=CC=1)C>>[CH2:1]([C:3]1[CH:4]=[CH:5][C:6]([C:9]2[S:10][C:11]([CH3:20])=[C:12]([C:16]([F:19])([F:17])[F:18])[C:13]=2[CH2:14][O:15][C:22]2[CH:27]=[CH:26][C:25]([CH2:28][CH2:29][C:30]([OH:32])=[O:31])=[C:24]([CH3:35])[C:23]=2[CH3:36])=[CH:7][CH:8]=1)[CH3:2]
Reactant: CCOC(=O)CCc1ccc(O)c(C)c1C
Reactant: CCc1ccc(-c2sc(C)c(C(F)(F)F)c2CO)cc1
Agent: CCOC(=O)CCc1cc(F)c(OCc2c(-c3ccc(CC)cc3)sc(C)c2C(F)(F)F)c(F)c1
Product: CCc1ccc(-c2sc(C)c(C(F)(F)F)c2COc2ccc(CCC(=O)O)c(C)c2C)cc1

Procedure:
The title compound was prepared according to the procedure described in Example 220 by coupling of [2-(4-ethylphenyl)-5-methyl-4-(trifluoromethyl)thiophen-3-yl]methanol and ethyl 3-(4-hydroxy-2,3-dimethylphenyl)propanoate followed by hydrolysis of ethyl 3-(4-((2-(4-ethyl phenyl)-5-methyl-4-(trifluoromethyl)thiophen-3-yl)methoxy)-3,5-difluorophenyl)propanoate to afford the desired product as an off-white solid.
Reaction SMILES: [NH2:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]([NH2:10])=[NH:9])=[N:6][CH:7]=1.C([O:13][C:14](=O)[CH2:15][C:16]([C:18]([F:21])([F:20])[F:19])=O)C.C(=O)([O-])[O-].[Na+].[Na+]>O.C(O)C>[NH2:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]2[N:10]=[C:14]([OH:13])[CH:15]=[C:16]([C:18]([F:21])([F:20])[F:19])[N:9]=2)=[N:6][CH:7]=1
Reactant: N=C(N)c1ccc(N)cn1
Reactant: CCOC(=O)CC(=O)C(F)(F)F
Agent: O=C([O-])[O-]
Agent: [Na+]
Solvent: O
Solvent: CCO
Product: Nc1ccc(-c2nc(O)cc(C(F)(F)F)n2)nc1
Reaction time: 24 h

Procedure:
To a solution of compound of example 12 (0.1 g, 0.73 mmol) in water (5 mL) and ethanol (2.5 mL) was added ethyl-4,4,4-trifluoroacetoacetate (0.216 g, 1.17 mmol) and sodium carbonate (0.140 g, 1.32 mmol) at room temperature, and the reaction mixture was stirred for about 24 hours. Ethanol was removed under reduced pressure, and the reaction mixture was diluted with water and extracted with ethyl acetate (3×10 mL). The organic layer was dried over anhydrous sodium sulfate and concentrated to obtain the crude product, which was purified by column chromatography (silica gel, 1% methanol in chloroform as an eluent) to obtain the title compound.
Reaction SMILES: [OH:1][C:2]1[CH:3]=[C:4]([CH2:9][C:10]#[N:11])[CH:5]=[CH:6][C:7]=1[CH3:8].C([O-])([O-])=O.[K+].[K+].[CH3:18][C:19]1[CH:26]=[CH:25][CH:24]=[C:23]([CH3:27])[C:20]=1[CH2:21]Cl>CN(C=O)C.CCOC(C)=O>[CH3:18][C:19]1[CH:26]=[CH:25][CH:24]=[C:23]([CH3:27])[C:20]=1[CH2:21][O:1][C:2]1[CH:3]=[C:4]([CH2:9][C:10]#[N:11])[CH:5]=[CH:6][C:7]=1[CH3:8]
Reactant: Cc1ccc(CC#N)cc1O
Reactant: Cc1cccc(C)c1CCl
Agent: O=C([O-])[O-]
Agent: [K+]
Solvent: CCOC(C)=O
Solvent: CN(C)C=O
Product: Cc1ccc(CC#N)cc1OCc1c(C)cccc1C
Reaction time: 16 h

Procedure:
To a stirred solution of 2-(3-Hydroxy-4-methylphenyl)acetonitrile (Step A, 2.18 g, 14.8 mmol), K2CO3 (2.66 g, 19.2 mmol) in dry DMF (20 ml) was added 2,6-Dimethylbenzyl chloride (2.97 g, 19.2 mmol) at room temperature under argon. The reaction mixture was stirred for 16 hours, diluted with EtOAc (40 ml), washed with water (20 ml) and brine. The organic layer was dried over Na2SO4, filtered, concentrated, and purified by flash chromatography on a silica gel column (hex: ethyl acetate 2:1) to give the title compound as a white solid.
Reaction SMILES: [NH:1]1[CH:5]=[N:4][CH:3]=[N:2]1.C(=O)([O-])[O-].[K+].[K+].Br[CH2:13][CH2:14][CH2:15][C:16]1[CH:21]=[CH:20][C:19]([N+:22]([O-:24])=[O:23])=[CH:18][CH:17]=1.O>C1COCC1>[N+:22]([C:19]1[CH:20]=[CH:21][C:16]([CH2:15][CH2:14][CH2:13][N:1]2[CH:5]=[N:4][CH:3]=[N:2]2)=[CH:17][CH:18]=1)([O-:24])=[O:23]
Reactant: O=[N+]([O-])c1ccc(CCCBr)cc1
Reactant: c1nc[nH]n1
Agent: O=C([O-])[O-]
Agent: [K+]
Solvent: O
Solvent: C1CCOC1
Product: O=[N+]([O-])c1ccc(CCCn2cncn2)cc1
Temperature: 50 °C
Reaction time: 60 h
Yield: 45.3 %

Procedure:
1,2,4-triazole (0.68 g) was dissolved in THF (8.0 ml), potassium carbonate (2.7 g) was added to the mixture, a solution of 1-(3-bromopropyl)-4-nitrobenzene (1.6 g) in. THF (8.0 ml) was added dropwise to the solution, and the mixture was stirred for 60 hours at 50° C. After cooling to room temperature, the reaction solution was added to water and extracted with ethyl acetate. The organic layer was washed with saturated brine, and dried over magnesium sulfate. The solvent was removed under reduced pressure, and the obtained residue was purified by silica gel column chromatography, to give 1-[3-(4-nitrophenyl)propyl]-1,2,4-triazole (0.69 g).
Reaction SMILES: [O:1]([CH2:8][C:9]1[S:15][CH:14]2[CH:11]([C:12](=[O:33])[N:13]2[C:16](=[C:30]([OH:32])[CH3:31])[C:17]([O:19][CH2:20][C:21]2[CH:26]=[CH:25][C:24]([N+:27]([O-:29])=[O:28])=[CH:23][CH:22]=2)=[O:18])[N:10]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C(N(CC)CC)C.[C:41]1([P:47](Cl)(=[O:55])[O:48][C:49]2[CH:54]=[CH:53][CH:52]=[CH:51][CH:50]=2)[CH:46]=[CH:45][CH:44]=[CH:43][CH:42]=1>O1CCCC1>[C:41]1([P:47](=[O:55])([O:32][C:30]([CH3:31])=[C:16]([N:13]2[C:12](=[O:33])[CH:11]3[CH:14]2[S:15][C:9]([CH2:8][O:1][C:2]2[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=2)=[N:10]3)[C:17]([O:19][CH2:20][C:21]2[CH:22]=[CH:23][C:24]([N+:27]([O-:29])=[O:28])=[CH:25][CH:26]=2)=[O:18])[O:48][C:49]2[CH:54]=[CH:53][CH:52]=[CH:51][CH:50]=2)[CH:42]=[CH:43][CH:44]=[CH:45][CH:46]=1
Reactant: O=P(Cl)(Oc1ccccc1)c1ccccc1
Reactant: CC(O)=C(C(=O)OCc1ccc([N+](=O)[O-])cc1)N1C(=O)C2N=C(COc3ccccc3)SC21
Solvent: CCN(CC)CC
Solvent: C1CCOC1
Product: CC(OP(=O)(Oc1ccccc1)c1ccccc1)=C(C(=O)OCc1ccc([N+](=O)[O-])cc1)N1C(=O)C2N=C(COc3ccccc3)SC21
Temperature: 20 °C
Reaction time: 3 h

Procedure:
To a stirred solution of p-nitrobenzyl α-(3-phenoxymethyl-7-oxo-4-thia-2,6-diazabicyclo(3,2,0)hept-2-en-6-yl)-α-(1-hydroxyethylidene)acetate (4.69 g) in tetrahydrofuran (60 ml.) under a nitrogen atmosphere at 0° C. was added triethylamine (1.6 ml.) followed by phenyl phenylphosphonochloridate (2.91 g). After stirring for 3 hours at 20° C., the tetrahydrofuran was evaporated and the residue dissolved in dichloromethane. The resulting solution was washed with 1% hydrochloric acid and then water, dried with magnesium sulphate and evapoated to give the title compound as a pale yellow friable foam in essentially quantitative yield. TLC (silica)Rf 0.64 (ethyl acetate). NMR δCDCl3 2.60 (m, 3H), 3.70-4.67 (m, 2H), 5.15 (s, 2H), 5.57-5.87 (m, 2H) and 6.6-8.17 (m, 19H).
Reaction SMILES: Br[C:2]1[CH:7]=[CH:6][C:5]([C@H:8]([C:16]2[CH:21]=[CH:20][C:19]([F:22])=[CH:18][CH:17]=2)[NH:9][S@:10]([C:12]([CH3:15])([CH3:14])[CH3:13])=[O:11])=[CH:4][CH:3]=1.[CH3:23][PH:24]([O-])([O-:28])[O:25][CH2:26][CH3:27].CCN(CC)CC>C1COCC1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2]>[CH3:13][C:12]([CH3:15])([S@@:10]([NH:9][C@@H:8]([C:16]1[CH:21]=[CH:20][C:19]([F:22])=[CH:18][CH:17]=1)[C:5]1[CH:6]=[CH:7][C:2]([P:24]([CH3:23])(=[O:28])[O:25][CH2:26][CH3:27])=[CH:3][CH:4]=1)=[O:11])[CH3:14]
Reactant: CCO[PH](C)([O-])[O-]
Reactant: CC(C)(C)[S@](=O)N[C@@H](c1ccc(F)cc1)c1ccc(Br)cc1
Agent: Cl[Pd]Cl
Agent: [Fe+2]
Agent: c1ccc(P(c2ccccc2)[c-]2cccc2)cc1
Solvent: CCN(CC)CC
Solvent: C1CCOC1
Product: CCOP(C)(=O)c1ccc([C@@H](N[S@@](=O)C(C)(C)C)c2ccc(F)cc2)cc1
Reaction time: 8 h
Yield: 68 %

Procedure:
To (S)—N—((S)-(4-bromophenyl)(4-fluorophenyl)methyl)-2-methylpropane-2-sulfinamide, 19-b, (10 g, 0.026 mol), ethyl methylphosphite (5.6 g, 0.052 mol) and Et3N (7.88 g, 0.78 mol) in THF (100 ml) was added PdCl2(dppf) (2.2 g). The mixture was allowed to stir overnight at reflux. The mixture was filtered and the filtrate was concentrated under vacuum. The residue was taken into dichloromethane and washed with brine. The organic layer was concentrated under vacuum and the residue was purified over silica gel (petroleum ether:ethyl acetate=1/1) to provide the product, 19-c, (6.9 g, 68%).
Reaction SMILES: [NH2:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][N:3]=1.[C:8](OCC)(=[O:13])[CH2:9][C:10]([CH3:12])=O>C(O)(=O)C>[CH3:12][C:10]1[N:1]=[C:2]2[CH:7]=[CH:6][CH:5]=[CH:4][N:3]2[C:8](=[O:13])[CH:9]=1
Reactant: Nc1ccccn1
Reactant: CCOC(=O)CC(C)=O
Solvent: CC(=O)O
Product: Cc1cc(=O)n2ccccc2n1

Procedure:
All the 3-bromo-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-ones were prepared from commercially available 2-aminopyridine derivatives. Thus, 2-aminopyridine derivative was reacted with ethyl acetoacetate in refluxing acetic acid to give 2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one in good yield. This intermediate was brominated using bromine in acetic acid to give 3-bromo-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-ones in good yield. All the intermediates prepared in this manner were characterized by spectral and analytical methods before using them for the preparation of compounds of invention.
Reaction SMILES: [NH:1]1[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[CH:3]=[C:2]1[C:10]([OH:12])=O.ON1C2C=CC=CC=2N=N1.C1(N=C=NC2CCCCC2)CCCCC1.[C:38]1([C:44]2[C:50]3[CH:51]=[CH:52][CH:53]=[CH:54][C:49]=3[N:48]([CH2:55][CH2:56][O:57][CH:58]3[CH2:63][CH2:62][CH2:61][CH2:60][O:59]3)[C:47](=[O:64])[CH:46]([NH2:65])[N:45]=2)[CH:43]=[CH:42][CH:41]=[CH:40][CH:39]=1>C(Cl)(Cl)Cl>[NH:1]1[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[CH:3]=[C:2]1[C:10]([NH:65][CH:46]1[N:45]=[C:44]([C:38]2[CH:39]=[CH:40][CH:41]=[CH:42][CH:43]=2)[C:50]2[CH:51]=[CH:52][CH:53]=[CH:54][C:49]=2[N:48]([CH2:55][CH2:56][O:57][CH:58]2[CH2:63][CH2:62][CH2:61][CH2:60][O:59]2)[C:47]1=[O:64])=[O:12]
Reactant: NC1N=C(c2ccccc2)c2ccccc2N(CCOC2CCCCO2)C1=O
Reactant: O=C(O)c1cc2ccccc2[nH]1
Agent: C(=NC1CCCCC1)=NC1CCCCC1
Agent: On1nnc2ccccc21
Solvent: ClC(Cl)Cl
Product: O=C(NC1N=C(c2ccccc2)c2ccccc2N(CCOC2CCCCO2)C1=O)c1cc2ccccc2[nH]1
Yield: 76 %

Procedure:
To a mixture of indole-2-carboxylic acid (0.19 g), N-hydroxybenzotriazole (0.16 g) and N,N'-dicyclohexylcarbodiimide (0.24 g) in chloroform (10 ml) was added a mixture (0.43 g) of (3RS)-1,3-dihydro-5-phenyl-3-amino-1-{2-((RS)-2-tetrahydropyranyloxy) ethyl }-2H-1,4-benzodiazepine-2-one and (3RS)-1,3-dihydro-5-phenyl-3-amino-1-{2-((SR)-2-tetrahydropyranyloxy) ethyl }-2H-1,4-benzodiazepine-2-one at ambient temperature under stirring. The mixture was stirred for 2 hours under the same conditions. The resultant precipitate was filtered off. The combined filtrate and washings were evaporated under reduced pressure and the residual oil (1.20 g) was subjected to column chromatography on silica gel with an eluent of a mixture of chloroform and ethyl acetate (10:1) to give a mixture (white powder, 0.45 g) of (3RS)-1,3-dihydro-3-(2-indolylcarbonylamino)-5-phenyl-1-{2-((RS)-2-tetrahydropyranyloxy)ethyl}-2H-1,4-benzodiazepine-2-one and (3RS)-1,3-dihydro-3-(2 -indolylcarbonylamino )-5-phenyl-1-{2-((SR)-2-tetrahydropyranyloxy) ethyl}-2H-1,4-benzodiazepine-2-one.
Reaction SMILES: [CH2:1]1[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[CH2:3][CH:2]1[CH2:10][C:11]([OH:13])=[O:12].[CH3:14][CH2:15]O>>[CH2:3]1[C:4]2[C:9](=[CH:8][CH:7]=[CH:6][CH:5]=2)[CH2:1][CH:2]1[CH2:10][C:11]([O:13][CH2:14][CH3:15])=[O:12]
Reactant: O=C(O)CC1Cc2ccccc2C1
Reactant: CCO
Product: CCOC(=O)CC1Cc2ccccc2C1
Yield: 90 %

Procedure:
A solution of acid 147 (32.0 g, 180 mmol) in dry EtOH (250 mL) and CH2SO4 (2.0 mL) was stirred at reflux temperature under N2 for 16 h. The solvent was evaporated, the residue partitioned between ice/water (200 mL) and DCM (50 mL) and the aqueous layer extracted with DCM (2×40 mL). The combined organic layer was washed with saturated aqueous NaHCO3 solution and water, dried and the solvent evaporated to yield ester 148 (33.3 g, 90%) (lit. Tanaka, et. al., J. Med. Chem. 1994, 37, 2071-2078) as a brown oil: 1H NMR δ 7.10-7.21 (m, 4H, H-4, H-5, H-6, H-7), 4.15 (q, J=7.1 Hz, 2H, CH2), 3.10-3.45 (m, 2H, H-1, H-3), 2.82-2.94 (m, 1H, H-2), 2.62-2.68 (m, 2H, H-1, H-3), 4.48 (d, J=7.4 Hz, 2H, CH2CO2), 1.27 (t, J=7.1 Hz, 2H, CH3).
Reaction SMILES: [CH3:1][O:2][CH2:3][O:4][C:5]1[CH:10]=[C:9]([O:11][CH3:12])[C:8]([O:13][CH3:14])=[C:7]([O:15][CH3:16])[C:6]=1[OH:17].[C:18](=O)([O-])[O-].[K+].[K+].IC>CN(C=O)C>[CH3:1][O:2][CH2:3][O:4][C:5]1[CH:10]=[C:9]([O:11][CH3:12])[C:8]([O:13][CH3:14])=[C:7]([O:15][CH3:16])[C:6]=1[O:17][CH3:18]
Reactant: COCOc1cc(OC)c(OC)c(OC)c1O
Reactant: O=C([O-])[O-]
Agent: [K+]
Solvent: CN(C)C=O
Solvent: CI
Product: COCOc1cc(OC)c(OC)c(OC)c1OC
Temperature: 45 °C

Procedure:
11.5 g of 2-methoxymethyloxy-4,5,6-trimethoxyphenol prepared in Referential Example 12 and 23.0 g of potassium carbonate were suspended in 100 ml of DMF. The suspension was heated at 45° C. while stirring, and 5.2 ml of iodomethane was dropwise added thereto. After the completion of the dropwise addition, the mixture was heated for 30 min, cooled and separated by filtration. 1 l of water was added to the mother liquor, and the mixture was extracted with ethyl acetate. The organic phase was washed with water and dried over anhydrous magnesium sulfate, and the solvent was distilled off. The residue was purified by silica gel column chromatography (eluent; n-hexane:ethyl acetate=85:15) to prepare 6.2 g of the product compound as a colorless oleaginous substance.
Reaction SMILES: [OH:1]C(COC1C=CC(C(O)=O)=CC=1)CN1CCN(CC(O)=O)CCN(CC(O)=O)CCN(CC(O)=O)CC1.[CH:39]1([N:45]=[C:46]=[N:47][CH:48]2[CH2:53][CH2:52][CH2:51][CH2:50][CH2:49]2)[CH2:44][CH2:43][CH2:42][CH2:41][CH2:40]1>N1C=CC=CC=1.C(N)=O>[C:46]([NH:45][CH:39]1[CH2:40][CH2:41][CH2:42][CH2:43][CH2:44]1)([NH:47][CH:48]1[CH2:53][CH2:52][CH2:51][CH2:50][CH2:49]1)=[O:1]
Reactant: O=C(O)CN1CCN(CC(=O)O)CCN(CC(O)COc2ccc(C(=O)O)cc2)CCN(CC(=O)O)CC1
Reactant: C(=NC1CCCCC1)=NC1CCCCC1
Solvent: NC=O
Solvent: c1ccncc1
Product: O=C(NC1CCCCC1)NC1CCCCC1

Procedure:
A solution of the gadolinium complex of 10-(2-hydroxy-3-(4-carboxyphenoxy)-propyl)-1,4,7-tris(carboxymethyl)-1,4,7,10-tetraazacyclododecane (500 mg, 0.72 mmol) in pyridine/formamide (1:1, 10 mL) was cooled to 0° C. with stirring. Dicyclohexylcarbodiimide (DCC, 149 mg, 0.72 mmol) and N,N-dimethylaminopyridine (DMAP, 20 mg, 0.16 mmol) were added. The resulting solution was stirred for 30 min at 0° C. A solution of dextran (MW 40,000; 1.0 g, 0.025 mmol) in formamide/pyridine (1:1, 30 mL) was prepared by gently warming a suspension of the polysaccharide. The dextran solution was added to the activated chelate and the mixture was stirred at 25° C. for 4 days. During this time a precipitate of dicyclohexylurea formed. The suspension was filtered and the polysaccharide was precipitated by dropwise addition of the filtrate into ethanol/ether (1:2, 300 mL). The suspension was stirred for 30 min then allowed to settle. The solvent was decanted off and the solid was isolated by filtration. The product was purified by GPC on a column of Sephadex G-25 eluted with distilled H2O. Fractions corresponding to the macromolecular component were collected, pooled and lyophilized. To ensure there were no small molecular components unremoved by GPC an analytical sample was prepared by ultrafiltration (Centrex MWCO 10,000) of an aqueous solution (500 μL) containing the product (300 mg). The retentate was collected and lyophilized giving a white pad (296 mg). The UV spectrum of an aqueous solution of this product (0.175 mg/mL) had an absorbance at 258 nm which confirmed the presence of the benzoic acid ester. The analytical sample contained 0.92% gadolinium, corresponding to approximately 3 mol Gd/mol dextran.
Reaction SMILES: [Br:1][C:2]1[CH:3]=[N:4][CH:5]=[C:6](I)[CH:7]=1.[CH3:9][C:10]([O:13][C:14]([NH:16][CH:17]1[CH2:22][CH2:21][NH:20][CH2:19][CH2:18]1)=[O:15])([CH3:12])[CH3:11].C(=O)([O-])[O-].[Cs+].[Cs+].C(C1CCCCC1=O)(=O)C(C)C>CCOC(C)=O.O1CCOCC1>[Br:1][C:2]1[CH:7]=[C:6]([N:20]2[CH2:19][CH2:18][CH:17]([NH:16][C:14](=[O:15])[O:13][C:10]([CH3:11])([CH3:9])[CH3:12])[CH2:22][CH2:21]2)[CH:5]=[N:4][CH:3]=1
Reactant: CC(C)(C)OC(=O)NC1CCNCC1
Reactant: Brc1cncc(I)c1
Agent: CC(C)C(=O)C1CCCCC1=O
Agent: O=C([O-])[O-]
Agent: [Cs+]
Solvent: CCOC(C)=O
Solvent: C1COCCO1
Product: CC(C)(C)OC(=O)NC1CCN(c2cncc(Br)c2)CC1
Temperature: 70 °C
Reaction time: 43 h
Yield: 26.3 %

Procedure:
A mixture of 3-bromo-5-iodopyridine (600 mg, 2.113 mmol, Aldrich), 4-(n-boc-amino)-piperidine (466 mg, 2.325 mmol, Aldrich), Cut (40.3 mg, 0.211 mmol, Aldrich) and cesium carbonate (1377 mg, 4.23 mmol, Strem) was capped, degassed and backfilled with argon (3×). Dioxane (2 mL) and 2-isobutyrylcyclohexanone (0.141 mL, 0.845 mmol, Aldrich) were added, and the reaction was stirred at 70° C. After 43 h, the reaction mixture was cooled to 23° C., diluted with EtOAc (50 mL) and washed with brine (50 mL), dried over MgSO4, concentrated in vacuo and purified by silica gel chromatography (eluent: 15-40% EtOAc/hexane), affording tert-butyl 1-(5-bromopyridin-3-yl)piperidin-4-ylcarbamate (198 mg, 26%). MS (ESI, pos. ion) m/z: 356.0 (M+1), 358.0 (M+3).
Reaction SMILES: CCOC(/N=N/C(OCC)=O)=O.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[Br-:32].[Li+].[CH2:34]([O:41][C:42]([N:44]1[CH2:49][CH2:48][CH:47](O)[CH2:46][CH2:45]1)=[O:43])[C:35]1[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=1>C1COCC1>[CH2:34]([O:41][C:42]([N:44]1[CH2:49][CH2:48][CH:47]([Br:32])[CH2:46][CH2:45]1)=[O:43])[C:35]1[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=1
Reactant: [Br-]
Reactant: O=C(OCc1ccccc1)N1CCC(O)CC1
Agent: CCOC(=O)/N=N/C(=O)OCC
Agent: [Li+]
Agent: c1ccc(P(c2ccccc2)c2ccccc2)cc1
Solvent: C1CCOC1
Product: O=C(OCc1ccccc1)N1CCC(Br)CC1
Temperature: 25 °C
Reaction time: 0.33 h
Yield: 40 %

Procedure:
Diethylazodicarboxylate (24.6 ml) was added dropwise to a stirred solution of triphenylphosphine (39.3 g) in THF (120 ml) at 0° C. under argon. The mixture was stirred for 20 minutes, then treated sequentially with lithium bromide (26.1 g) and a solution of 1-benzyloxycarbonylpiperidine-4-ol (7.1 g) in THF (50 ml). The mixture was allowed to warm to room temperature and stirring was continued for 1 hour. The mixture was concentrated, the residue treated with ether (100 ml) and silica (60 ml), and the solvent was evaporated under reduced pressure. The resulting powder was added to the top of a flash column and the column was eluted with hexane/ether (4:1) to give 1-benzyloxycarbonyl-4-bromopiperidine (3.6 g) as a colourless oil. NMR: (CDCl3): δ, 1.8-2.0(2H,m); 2.0-2.2(2H,m); 3.3-3.5(2H,m); 3.6-3.8(2H,m); 4.35(1H,m); 5.1(2H,s); 7.3(5H,m) m/e 298/300(M+H)+ ; 320/322(M+Na)+.
Reaction SMILES: I[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH3:8][C:9]1[CH:13]=[C:12]([CH3:14])[NH:11][N:10]=1>CN(C=O)C>[CH3:8][C:9]1[CH:13]=[C:12]([CH3:14])[N:11]([C:2]2[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=2)[N:10]=1
Reactant: Ic1ccccc1
Reactant: Cc1cc(C)[nH]n1
Solvent: CN(C)C=O
Product: Cc1cc(C)n(-c2ccccc2)n1

Procedure:
Operating protocol A (110° C., 54 hours) was followed using 117 mg of Chxn-Py-Al (0.4 mmoles), 336 μl of iodobenzene (3 mmoles), 192 mg of 3,5-dimethylpyrazole (2 mmoles) and 1.2 ml of DMF. The degree of transformation and selectivity for 5-dimethyl-1-phenyl-1H-pyrazole were 100%.
Reaction SMILES: [I-].[CH:2]([C:5]1[CH:10]=[C:9]([C:11]([F:14])([F:13])[F:12])[CH:8]=[CH:7][C:6]=1[C:15]1[O:16]CC(C)(C)[N+]=1C)([CH3:4])[CH3:3].[OH-:23].[Na+].Cl>CO>[CH:2]([C:5]1[CH:10]=[C:9]([C:11]([F:12])([F:13])[F:14])[CH:8]=[CH:7][C:6]=1[C:15]([OH:16])=[O:23])([CH3:3])[CH3:4]
Reactant: CC(C)c1cc(C(F)(F)F)ccc1C1=[N+](C)C(C)(C)CO1
Reactant: [OH-]
Agent: Cl
Agent: [I-]
Agent: [Na+]
Solvent: CO
Product: CC(C)c1cc(C(F)(F)F)ccc1C(=O)O
Temperature: 75 °C
Reaction time: 3 h
Yield: 90.3 %

Procedure:
To a solution of 2-(2-isopropyl-4-trifluoromethyl-phenyl)-3,4,4-trimethyl-4,5-dihydro-oxazol-3-ium iodide (step 2) (1.26 g, 2.949 mmol) in 12 ml methanol were added 5N NaOH solution (11.8 ml, 58.98 mmol). The mixture was stirred in a 75° C. oil bath for 3 hours. The solution was cooled in an ice bath and acidified to pH 1 with a 5N HCl solution. The methanol was removed in vacuo. The suspension was stirred in an ice bath. The solid was filtered, washed with water and dried in vacuo to provide 618 mg (90%) of the title compound as a white solid. MS (m/e): 231.1 (M−H).
Reaction SMILES: [CH3:1][O:2][C:3]1[CH:10]=[CH:9][CH:8]=[CH:7][C:4]=1[CH:5]=O.[CH2:11]([O:13][C:14](=[O:19])[CH2:15][C:16](=[NH:18])[NH2:17])[CH3:12]>C(O)C>[CH2:11]([O:13][C:14]([C:15]1[CH:5]([C:4]2[CH:7]=[CH:8][CH:9]=[CH:10][C:3]=2[O:2][CH3:1])[C:15]([C:14]([O:13][CH2:11][CH3:12])=[O:19])=[C:16]([NH2:17])[NH:18][C:16]=1[NH2:17])=[O:19])[CH3:12]
Reactant: CCOC(=O)CC(=N)N
Reactant: COc1ccccc1C=O
Solvent: CCO
Product: CCOC(=O)C1=C(N)NC(N)=C(C(=O)OCC)C1c1ccccc1OC
Yield: 72 %

Procedure:
Upon boiling a solution of 6.8 g 2-methoxybenzaldehyde and 13.0 g amidinoacetic acid ethyl ester in 150 ml ethanol for 2 hours, 2,6-diamino-4-(2-methoxyphenyl)-1,4-dihydropyridine-3,5-dicarboxylic acid diethyl ester of m.p. 147° C. (ethanol) is obtained.