bluuebunny/crossref_metadata_2025_split huggingface dataset:
A novel catalytic system—NdCl3 · HMPA/AI(i‐6u)3 for copolymerization of isoprene and styrene
Authors: Xu Xiao‐Ming , Ni Xu‐Feng , Shen Zhi‐Quan 
Published: September 2010

AbstractCo polymerization of styrene (St) and isoprene (IP) was carried out with a catalyst system composed of anhydrous lanthanide chloride hexamethyl phosphor amide complex (LnC13‐HMPA) and aluminum organic compound (AOC). Among the catalysts examined, catalyst NdC13*HMPA/Al(i‐Bu)3 showed a high activity in the copolymerization under certain conditions giving copolymers (5%‐158 St content) with high cis‐1, 4 microstructure in IP Units (>95%). The effects of HMPA/Nd molar ratio, Al/Nd molar ratio, monomer/Nd molar ratio, St feed ratio, and the reaction time on copolymerization were examined with this catalytic system. The obtained copolymers were characterized by 1H and 13C NMR spectroscopies and gel‐permeation chromatography (GPC).
A novel non‐phosgene process for the synthesis of methyl N‐phenyl carbamate from methanol and phenylurea: Effect of solvent and catalyst
Authors: Wang Xin‐Kui , Yan Shi‐Run , Cao Yong , Fan Kang‐Nian , He He‐Yong , Kang Mao‐Qing , Peng Shao‐Yi 
Published: September 2010

AbstractA novel environmentally benign process for the synthesis of methyl N‐phenyl carbamate (Mpc) from methanol and phenylurea was studied. Effect of solvent and catalyst on the reaction behavior was investigated. The IR spectra of methanol and phenylurea dissolved in different solvents were also recorded. Compared with use of methanol as both a reactant and a solvent, phenylurea conversion and selectivity to Mpc increased by using toluene, benzene or anisole as a solvent, while phenylurea conversion decreased slightly by using n‐octane as a solvent. The phenylurea conversion declined nearly 50% when dimethyl sulfoxide (DMSO) was used as a reaction media, and MPC selectivity decreased as well. The catalytic reaction tests showed that a basic catalyst enhanced the selectivity to Mpc while an acidic catalyst promoted the formation of methyl carbamate and aniline. Moderate degree of basicity showed the best catalytic performance in the cases studied.
Investigation on molecular non‐covalent interaction in the sodium dodecyl benzene sulfonate‐polychrome blue B‐protein replacement reaction
Authors: Gao Hong‐Wen , Wu Ji‐Rong , Shen Rong 
Published: September 2010

AbstractThe molecular noncovalent interaction often originates from the electrostatic attraction and accords with the Langmuir isothermal adsorption. The sodium dodecyl benzene sulfonate (SDBS)‐polychrome blue B (PCB>protein bovine serum albumin (BSA), ovalbumin (OVA) and myoglobin (MB)] ternary reaction has been investigated at pH 3.88. Protein to replace PCB from the PCB‐SDBS binding product was used to characterize the assembly of an invisible‐spectral compound, SDBS, on proteins by measuring the variation of FCB light‐absorption by tbe micro‐surface adsorption‐spectral correction (MSASC) technique. The effect of ionic strength and temperature on the aggregation was studied. Results showed that the aggregates SDBS92·BSA, SDBS58·VA and SDBS15·MB at 30 C and SDBS83·BSA. SDBS39·OVA and SDBS10·MB at 50 °C are formed.
Selective oxidation of propane over CsFePVAsMo heteropoly compound catalyst
Authors: Cai Tie‐Jun , Yu Chang‐Lin , Deng Qian , Peng Zhen‐Shan , Long Yun‐Fei , Lü Xiao‐Meng 
Published: September 2010

AbstractBoth the partially reduced and non‐reduced multi‐component heteropoly compound catalysts with Keggin structure were prepared and used for the selective oxidation of propane. The catalysts were characterized by IR, H2‐TPR, NH3,‐TPD, SEM and XRD. The addition of Cs increased the selectivity of acrylic acid and acetic acid. The selective oxidation performance was greatly improved with the addition of As. Among all of the tested catalysts, the catalytic performance of the Cs1.8Fe0.16HxPVAs0.4Mo11O40 (non‐reduced) was the best and the maximum yield of acrylic acid reached 16.42%.
Crystal structure, thermal analysis and theoretical calculation of a one‐dimensional chain complex [zn(dafo)2(H2O)2](NO3)2
Authors: Zhang Rong‐Lan , Zhao Jian‐She , Gao Xin , Shi Qi‐Zhen , He Shui‐Yang 
Published: September 2010

AbstractA novel one‐dimensional chain complex [Zn(dafo)2(H2O)2](NO3)2 was obtained when we tried synthesizing a mixed ligand supramolecular compound of Zinc(II) with dafo and o‐phthalic acid. Its structure was determined by single‐crystal X‐ray diffraction analysis. The crystal belongs to triclinic system, P‐1 space group. The crystallographic data: a=0.6989(4) nm, b=0.8281(5) nm, c=1.0231(5) nm, α=94.934(5)°, β=91.366(7)°, γ=99.820(7)°, V=0.5809(5) nm3, Z= 1, F(000)=300, Mr=589.78, Dc=1.686 g/cm3, μ(Mo Kα)=1.130 mm−1, R1=0.0521, wR2=0.1096. The analysis of the crystal structure indicates that the compound has a one‐dimensional chain structure which is formed by hydrogen bonds. The constitutes of the title complex were proved by elemental analysis, IR spectra and thermal analysis. On the basis of the experimentation, the complex was calculated by DFT‐B3LW/LANL2DZ in Gaussian‐98w also.
Stereoselective synthesis of (E)‐α‐aryltellurenylvinylstannanes and their application in the synthesis of stereodefined trisubstituted alkenes
Authors: Cai Ming‐Zhong , Huang Jia‐Di , Zhang Rong‐Li 
Published: September 2010

Abstract(E)‐α‐Aryltellurenylvinylstannanes have been synthesized stereoselectively via the hydrozirconation of alkynylstannanes, followed by the reactions with aryltellurenyl iodides. (E)‐α‐Aryltellurenylvinylstannanes can undergo sequential cross coupling reactions with both electrophiles and nucleophiles in the presence of transition metal complexes to form two carbon‐carbon bonds in the same olefinic carbon leading to trisubstituted alkenes stereoselectively.
Homocoupling of polyfluorovinylstannanes mediated by a novel combination of CuCl/2,2′‐dipyridyl. Stereospecific synthesis of polyfluorinated alka‐2,4‐dienes
Authors: Shen Yan‐Chang , Wang Guo‐Ping 
Published: September 2010

AbstractA new homocoupling methodology mediated by a novel combination of CuCl‐2,2‐dipyridyl and its application to the synthesis of substituted polyfluorinated alka‐2,4‐dienes are described.
Synthesis and crystal structure of a New Diamine complex CuCl4(H2tn)
Authors: Zhang Gai , Zhang Rong‐Lan , Zhao Jian‐She , Gao Xin , Wang Shao‐Kang , He Shui‐Yang 
Published: September 2010

AbstractIn an attempt to synthesize a new pyrimidine complex of copper(II) in a solution reaction of CuBr2 with 2,2′‐bis(hexahydropyrimidine) and hydro‐chloric acid, we unexpectedly obtained a bright yellow chip‐like crystal of CuC4(H2tn) [H,tn=(H3NCH2CH2CH2NH3)2+]. Its structure was determined by single‐crystal X‐ray diffraction analysis. The crystal belongs to orthorhombic system, space group Pnma, with cell parameters: a=0.7216(2) nm, b= 1.8308(6) nm, c=0.7553(3) nm, V=0.9953(6) nm3, Z=4, F(000)=564, Mr=281.49, D,= 1.879 g/cm3. μ(Mo Ka)=3.204 m−1, R1=0.0248, wR2=0.0575. The analysis of the crystal structure indicates that the complex has a three‐dimensional network structure, which is formed by hydrogen bonds and electrostatic interaction.
Total synthesis of tetrahydroquinoline alkaloid (+)‐Angustureine
Authors: Lin Xian‐Feng , Li Yu , Ma Da‐Wei 
Published: September 2010

Abstract(+ )‐(S)‐Angustureine was synthesized using a CuI‐catalyzed coupling reaction of iodobenzene with an enantiopure β‐amino ester as the key step. The overall yield is 36% in 7 linear steps.
Synthesis and characterization of ethylthioethylcyclopentadienyl organolanthanide complexes: CpLnCl (Ln=Gd, Dy), Cp2LnCpTh (Ln=Yb, Sm, Dy, Y) and CpThErCl2·2THF
Authors: Zhu Ming , Zhang Li‐Bei , Chen Ying‐Hua , Zhou Xi‐Geng , Cai Rui‐Fang , Weng Lin‐Hong 
Published: September 2010

AbstractSix new ethylthioethylcyclopentadienyl containing organolanthanide complexes CpLnCl [Ln=Gd (1), Dy (2)] and Cp2LnCpTh [Cp=C5H5, Ln=Yb (3), Sm (4), Dy (5), Y (6)] were synthesized by the reaction of ethylthioethyl‐cyclopentadienyl (CpTh) sodium salt with LnCl3 or Cp2LnCl in THF. Complexes 1–6 were characterized by elemental analyses, infrared and mass spectroscopies. The molecular structures of complexes 1–3 were also determined by the X‐ray single crystal diffraction. The results show that the side‐chain sulfur atom on the ethylthioethylcyclopentadienyl ring can form intramolecular chelating coordination to the central lanthanide ion, improving the stability of organolanthanide complexes and reducing the number of coordinated THF molecules.
Synthesis of 5‐fluoroalkyl lsoxazolidines via 1,3‐dipolar cycloaddition of ethyl 2‐hydropolyfluoroalk‐2‐enoates with nitrones
Authors: Liu Jin‐Tao , Jin Qi‐Hui , Lü He‐Jun , Huang Wei‐Yuan 
Published: September 2010

Abstract1,3‐Dipolar cycloaddition reactions of ethyl 2‐hydropolyfluoroalk‐2‐enoates (1) with some nitrones were described. The reaction of 3,4‐dihydroisoquinoline N‐oxide (2) with 1 took place readily in methylene chloride at room temperature to give the corresponding 5‐fluoroalkylisoxazolidines regioselectively as a mixture of two diastereoisomers (trans and cis) in high yields, while longer reaction time and higher temperature were needed in the case of non‐cyclic nitrones. Under similar conditions the reaction of quinoline N‐oxide (14) with 1 did not give the expected adducts and a ring‐opening product was obtained.
A simple and highly efficient preparation of structurally diverse aryl β‐diketoacids as hiv‐1 integrase inhibitors
Authors: Jiang Xiao‐Hua , Long Ya‐Qiu 
Published: September 2010

AbstractIn order to provide a facile and practical access to structurally diverse aryl β‐diketoacids, An improved and highly efficient oxalylation method was developed which employed commercially available and cheap reagents. The oxalylation of aryl methyl ketones, the key step to construct the pharmacophore of aryl β‐diketoacids. was considerably facilitated by a new combination of dimethyl oxalate as an oxalic source and sodium tert‐butoxide as a base. A wide variety of aryl β‐diketoacids bearing different functional groups can be prepared rapidly in high yields at room temperature with this method, which has significant advantages over the previously reported procedures in a wider application range, much less amount of reagents, pretty higher yields and quite shorter reaction time. The bis‐aryldiketoacids 3k and 31, readily prepared by this method, displayed interesting and promising inhibitory activities against HIV‐1 integrase and HN‐I replication in cells.
Synthesis and biological activity of tonghaosu analogs containing phenoxy‐phenyl moiety
Authors: Chen Li , Xu Han‐Hong , Yin Biao‐Lin , Xiao Chun , Hu Tai‐Shan , Wu Yu‐Lin 
Published: September 2010

AbstractA new series of phenoxy‐phenyl moieties containing tonghaosu analogs with varied B‐ring 9 were synthesized and characterized by spectral studies. Their insect antifeedant activity against Pieris brassicae and insecticidal activity against Culex quinquefasciatus were investigated. Compound 9e exhibited excellent antifeeding activity.
Some attempts to employ the singlet oxygen generated from H2O2
Authors: Jin Hong‐Xia , Liu He‐Hua , Wu Yi‐Kang 
Published: September 2010

AbstractSome attempts to employ the singlet oxygen generated from molybdate‐catalyzed decomposition of hydrogen peroxide are presented. Reduction of ascaridole with diimide is also described, along with the preliminary results of the cleavage study using Fe‐cysteinate as a simple model for FeS type redox species. There were strong indications that S‐alkylation occurred as observed in similar cleavage of the potent antimalarial qinghaosu.
Thermal decomposition behavior and non‐isothermal decomposition reaction of copper(II) salt of 4‐hydroxy‐3,5‐dinitropyridine oxide and its application in solid rocket propellant
Authors: Chen Pei , Zhao Feng‐Qi , Luo Yang , Hu Rong‐Zu , Gao Sheng‐Li , Zheng Yu‐Mei , Deng Min‐Zhi , Gao Yin 
Published: September 2010

AbstractThe thermal decomposition behavior and kinetic parameters of the exothermic decomposition reactions of the title compound in a temperature‐programmed mode have been investigated by means of DSC, TG‐DTG and lower rate Thermolysis/FTIR. The possible reaction mechanism was proposed. The critical temperature of thermal explosion was calculated. The influence of the title compound on the combustion characteristic of composite modified double base propellant containing RDX has been explored with the strand burner. The results show that the kinetic model function in differential form, apparent activation energy Ea and pre‐exponential factor A of the major exothermic decomposition reaction are 1‐a,207.98 kJ*mol−1 and 1015.64 s−1, respectively. The critical temperature of thermal explosion of the compound is 312.87 C. The kinetic equation of the major exothermic decomposition process of the title compound at 0.1 MPa could be expressed as: dα/dT=1016.42 (1–α)e‐2.502×104/T As an auxiliary catalyst, the title compound can help the main catalyst lead salt of 4‐hydroxy‐3,5dinitropyridine oxide to enhance the burning rate and reduce the pressure exponent of RDX‐CMDB propellant.
Thermal decomposition kinetics of triethylene glycol dinitrate
Authors: Chen Pei , Zhao Feng‐Qi , Luo Yang , Hu Rong‐Zu , Li Shang‐Wen , Gao Yin 
Published: September 2010

AbstractThe thermal behavior and kinetic parameters of the decomposition reaction of triethylene glycol dinitrate (TEGDN) in a temperature‐programmed mode at different pressures (0.1, 2, 4 and 6 MPa) have been investigated by means of DSC and TG‐DTG. The results show that the properties of the thermal decomposition of TEGDN are affected by the change of pressure, and the kinetic model function, the apparent activation energy Ea. and pre‐exponential factor A of this reaction are 2(1−α)[−ln(1−α)]1/2, 106.54 kJ·mol−1 and 109.17s−1 at 0.1 MPa, and 120.82 kJ·mol−1 and 1010.56 s−1 at 2 MPa, respectively. The critical temperature of thermal explosion of TEGDN obtained by the values Teo and Tpo of the onset temperature Te and the peak temperature Tp when the heating rate tends to zero are 191.05, 209.86 °C at 0.1 MPa, 207.59 and 221.65 °C at 2 MPa, respectively.
Kinetic study on the exothermic decomposition reaction of 2,4,6,8‐tetranitro‐2,4,6,8‐tetraazabicyclo[3,3,1]onan‐3,7‐dione
Authors: Hu Rong‐Zu , Song Ji‐Rong , Zhao Feng‐Qi , Wang Bo‐Zhou , Gao Sheng‐Li , Zhu Chun‐Hua , Chen Pei , Luo Yang , Ning Bin‐Ke , Chen San‐Ping , Shi Qi‐Zhen 
Published: September 2010

AbstractThe kinetic parameters of the exothermic decomposition reaction of the title compound in a temperature‐programmed mode have been studied by means of DSC. The empirical kinetic model function in differential form, apparent activation energy (Ea) and pre‐exponential factor (A) of this reaction are (1−α)0.222, 225.8 kJ·mol−1 and 1020.21 s−1, respectively. The critical temperature of thermal explosion of the compound is 224.9°C.
Investigation of the crystallization kinetics of Zn(Met)(AcO)2·H2O in mixed solution of water and acetone by microcalorimetry
Authors: Ren Yi‐Xia , Gao Sheng‐Li , Chen San‐Ping , Jiao Bao‐Juan , Hu Rong‐Zu , Shi Qi‐Zhen 
Published: September 2010

AbstractThe crystal growth process of Zn(Met)(AcO)2·H2O from the mixed solution of water and acetone has been investigated using a Calvet microcalorimeter. The heat produced and the rate of heat production during the crystal growth process at 298.15, 301.15, 304.15, 307.15 and 310.15 K have been measured. On the basis of experimental and calculated results, the thermodynamics parameters (the apparent activation enthalpy, the activation entropy, and the activation free energy), the rate constant and the kinetic parameters (the activation energy, the pre‐exponential factor) during the crystal growth process have been obtained. The results show that the crystal growth proceeds in accordance with the Burton‐Cabrera‐Frank dislocation theory.
Thermokinetic study on the complexation reaction of the first‐row transitional metal chlorides with histidine
Authors: Chen San‐Ping , Gao Sheng‐Li , Shi Qi‐Zhen 
Published: September 2010

AbstractThe enthalpy change of the complexation reactions of the first‐row transitional metal chlorides including CrCl3, MnCl2, FeCl2, CoCl2, NiCl2 and CuCl2 with L‐α‐histidine in water were determined by a microcalorimeter at 298.15‐323.15 K. The standard enthalpy of formation of Cr(His) (aq) and M(His) (aq) (M=Mn, Fe, Co, Ni and Cu) were calculated. Based on the thermodynamic and kinetic equations of the reactions, three thermodynamic parameters (the activation enthalpy, the activation entropy, the activation free energy), the rate constants, and three kinetic parameters (the apparent activation energy, the pre‐exponential constant and the reaction order) are obtained. The solid complexes of CrCl3, MnCl2, FeCl2, CoCl2, NiCl2 and CuCl2 with histidine were prepared and identified as Cr(His)2Cl3·H2O. Mn(His)2Cl2·4H2O. Fe(His)2Cl2·H2O, Co(His)2Cl2·H2O, Ni(His)2Cl2·H2O and CU(HiS)2Cl2·H2O by chemical and elemental analyses. The bonding characteristics of these complexes were characterized by R as well. The results showed that, with the atomic number increasing, three thermodynamic parameters, ΔG, ΔH and ΔS of the complexation reaction of these metal chlorides with L‐α‐histidine in water present an analogy regularity.
Synthesis and electrochemical characterization of gradient composite LiNi1−yCoyO2 used as cathode materials in lithium‐ion battery
Authors: Zhao Yu‐Juan , Xia Ding‐Guo , Liu Qing‐Guo 
Published: September 2010

AbstractGradient composites, LiNi1−yCoyO2, are synthesized from coated spherical Ni(OH)2 precursor. These composites could be applied as new cathode materials in lithium‐ion batteries because they have low cobalt content (y≤0.2) and exhibit excellent properties during high‐rate charge/discharge cycles. The initial discharge capacity of coated composite of LiNi0.95O2 is 186 mAh/g, and the decreasing rate of the capacity is 3.2% in 50 cycles at 1 C rate. It has been verified by TEM and EDX experiments that a core‐shell structure of the composite particles develops because of the cobalt enrichment near the surfaces, and the formation of the cobalt enrichment layer is sensitive to sintering tempera‐. High cobalt surface concentration may reduce the undesired reactions and stabilize the structure of the particles.
Aluminum ion removal from monoaluminum ovotransferrin by pyrophosphate
Authors: Li Ying‐Qi , Yang Bin‐Sheng 
Published: September 2010

AbstractThe rates at which aluminum was removed from the N‐ and C‐terminal monoaluminum ovotransferrins by pyrophosphate were evaluated by UV difference spectra in 0.01 mol/L Hepes, pH=7.4 and at 37 °C. Pesudo first‐order rate constants as a function of pyrophosphate concentration were measured. The results indicate that the pathways of aluminum removal are different. For the N‐terminal binding site, aluminum removal follows simple saturation kinetics, while the removal of aluminum from the C‐terminal binding site reverts to the combination of saturation and first‐order kinetics. The saturation component is consistent with a rate‐limiting conformational change in the protein as has been reported. We propose that the first‐order kinetics mechanism is attributed to a pre‐equilibrium process. The rate constants of saturation kinetics are accelerated from both terminals with the addition of 0.1 mol/L chloride to the monoaluminum ovotransferrin solutions, whereas the rates of the first‐order kinetics are decreased for the C‐terminal binding site. The effect of chloride ionic strength causes a continuing increase on kobs for the N‐ and C‐terminal binding sites. Moreover, the kinetics behavior of the N‐terminal is more easily affected by chloride than that of the C‐terminal. In the experiment presumably the N‐terminal site is apparently kinetically more labile than the C‐terminal site.
Electrochemical characteristics of Mg0.9Ti0.1‐xZrxNi (x=0.02, 0.04, 0.06) alloys
Authors: Yuan Hua‐Tang , Feng Yan , Qiao Lin‐Jun , Liu Qiang , Wang Yi‐Jing 
Published: September 2010

AbstractMg‐based hydrogen storage alloys Mg0.9Ti0.1‐xZrxNi (x=0.02, 0.04, 0.06) were successfully prepared by means of mechanical alloying (MA). The effects of Zr addition on the discharge capacity and the cycle performance of the Mg‐based electrodes were also studied. It was found that the discharge capacities were improved with addition of a small amount of Zr and the cycle performances of the alloy were stabilized with the addition of Ti. the effects of surface modification or coating on the properties of Mg0.9Ti0.1‐xZrxNi were also studied. The results indicated that coating with graphite improved both the discharge capacity and cycle life of the amorphous Mg0.9Ti0.1‐xZrxNi electrode.
Determination of ultratrace silver using surfactant as sensitizer by catalytic near field laser thermal lens spectrometry
Authors: Han Quan , Yan Hong‐Tao , Qian Zhen‐Jie 
Published: September 2010

AbstractA new method for the determination of ultratrace silver(I) by near field laser thermal lens spectrometry has been developed. This method is based on the silver(I) catalyzed discoloring reaction of bromcresol green oxidized by sodium persulfate in the presence of α,α'‐bipyridine as an activator and TritonX‐100 as a sensitizer. The reaction mechanism was discussed. The linear range of the method is 0–1.6 ng·mL−1 and the detection limit is 2×10−2 ng·mL−1 for silver. The method has been applied to the determination of silver in lead powder and photographic paper with satisfactory results.
A facile synthesis of ethyl 2,4‐dimethoxy‐6‐perfluoroalkyl‐benzoates via acyclic precursors
Authors: Cao Wei‐Guo , Shi Zhi‐Jian , Fan Chun , Sun Ru‐Shu 
Published: September 2010

AbstractThe acyclic precursors. methyl 3‐perfluoroallkyl‐4‐carbethoxy‐5‐methoxy‐6‐(trihenylphosphoranylidene)hexa‐2.4‐dienoates (4) were obtained via the addition reaction of ethyl 3‐methoxy‐4‐(triphenylphosphoranylidene)but‐2‐enoate (2) with equally molar methyl 2‐perfluoroalkynoates (3). Ethyl 2,4‐dimethoxy‐6‐perfluoroalkylbenzoates (5) were synthesized in high yield via an intramolecular elimination of Ph3PO of 4 by heating in anhydrous benzene in a sealed tube. The structure of these compounds was confirmed by IR, 1H, 13C, 2D C‐H cosy NMR and mass spectra and elemental analyses. The possible reaction mechanisms were also proposed.
Novel synthesis of 1,2,3‐Triazoles via 1,3‐dipolar cycloadditions of alkynes to azides in ionic liquid
Authors: Zhong Ping , Guo Sheng‐Rong 
Published: September 2010

Abstract2‐Azido‐3,5‐dichloropyridine and 2‐azido‐5‐chloro‐3‐fluoropyridine were given by reaction of sodium azide with 2,3,5‐trichloropyride, 3,5‐dichloro‐2‐fluoropyriridine or 5‐chloro‐2,3‐difluoropyridine in ionic liquids. 1,3‐Dipolar cycloaddition of 2‐azido‐3,5‐dichloropyridine or 2‐azido‐5‐chloro‐3‐fluoropyridine to alkynes in ionic liquids afforded the corresponding 1,4,5‐trisubstituted [1,2,3]‐triazoles in good yields and regioselectivities.
Chemoselective dehydrogenation of 3‐[2‐(3,4=Dihydro‐1‐naphthalenyl)ethyl]imidazolidine‐2,4‐diones: A new and convenient synthesis of 13,16‐diazaequilenin analogs
Authors: Parihar J. A. , Ramana M. M. V. 
Published: September 2010

AbstractThe synthesis of the title compounds starting with the chemoselective dehydrogenation of 3‐[2‐(3,4‐dihydro‐naphthalenyl)ethyl]imidazolidine‐2,4‐diones has been described.
Cyano‐ and nitro‐containing compounds from the roots of Semiaquilegia adoxoides
Authors: Zhang Hua , Liao Zhi‐Xin , Yue Jian‐Min 
Published: September 2010

AbstractFour cyano‐containing compounds, (1E,4α,5β,6α)4,5,6‐trihydroxy‐2‐cyclohexen‐1‐ylideneacetonitrile (1), lithospermoside (2), 4‐hydroxy‐2‐β‐D‐glucopyranosyl oxyphenylacetonitrile (3) and 4‐[β‐D&hyphen;apiofuranosyl‐(1→6)‐O‐β‐D‐glucopyranosyl oxy]phenylacetonitrile (4), and a nitro‐containing one, 4‐[β‐D‐xylopyranosyl‐(1→6)‐O‐β‐D‐glucopyranosyloxy]‐1‐(2‐nitroethyl)benzene (5), as well as eleven other types of compounds, were isolated from the roots of Semiaquilegia adoxoides. Their structures were elucidated mainly by spectroscopic methods. Among them, 1 and 4 are new isolated compounds. The cyano‐ and niawcontaining compounds are very rare in plants and their isolation from one traditional Chinese medicine is really interesting.