(-)-Dimethyl(1R,4aS),4a-dimethyl-6-nitro-1,2, 3,4, 4a-pentahydrofluorene-1, 9 -dicarboxylate (1) was synthesized from (R)-(+)-2 -methyl- 2 -(2 -nitrovinyl)-δ-valerolactone(2),which constitutes a formal total Synthesi...(-)-Dimethyl(1R,4aS),4a-dimethyl-6-nitro-1,2, 3,4, 4a-pentahydrofluorene-1, 9 -dicarboxylate (1) was synthesized from (R)-(+)-2 -methyl- 2 -(2 -nitrovinyl)-δ-valerolactone(2),which constitutes a formal total Synthesis of (-)-gibberellin A_(12).展开更多
Several chiral mixed-ligand complexes have been synthesized and their efficiency as catalysts for the asymmetric synthesis of chrysanthemic acid tested.
Two new chiral liquid crystals of schiff-base type have been synthesized.This series of compounds contain α-chloro acidic ester chain prepared from commercially available L-valine.Both of the compounds exhibit tilted...Two new chiral liquid crystals of schiff-base type have been synthesized.This series of compounds contain α-chloro acidic ester chain prepared from commercially available L-valine.Both of the compounds exhibit tilted smectic phases;their phase transitions were studied using DSC and polarized optical microscopy;the influence of intramolecular hydrogen bonds on the phase behavior was studied as well.展开更多
Of organic compounds,nitronic esters are a group of unusual compounds.Accordingto their chemical formula（R<sub>1</sub>R<sub>2</sub>C=NO<sub>2</sub>R<sub>3</sub>）,they ...Of organic compounds,nitronic esters are a group of unusual compounds.Accordingto their chemical formula（R<sub>1</sub>R<sub>2</sub>C=NO<sub>2</sub>R<sub>3</sub>）,they might be formally obtained fromcondensation of aci-nitro compounds（intronic acids）and alcohols with an equivalentamount of water eliminated.In fact,neither could nitronic esters be produced by thismethod,nor could they be hydrolyzed into nitronic acids and alcohols.Since they展开更多
文摘(-)-Dimethyl(1R,4aS),4a-dimethyl-6-nitro-1,2, 3,4, 4a-pentahydrofluorene-1, 9 -dicarboxylate (1) was synthesized from (R)-(+)-2 -methyl- 2 -(2 -nitrovinyl)-δ-valerolactone(2),which constitutes a formal total Synthesis of (-)-gibberellin A_(12).
文摘Several chiral mixed-ligand complexes have been synthesized and their efficiency as catalysts for the asymmetric synthesis of chrysanthemic acid tested.
文摘Two new chiral liquid crystals of schiff-base type have been synthesized.This series of compounds contain α-chloro acidic ester chain prepared from commercially available L-valine.Both of the compounds exhibit tilted smectic phases;their phase transitions were studied using DSC and polarized optical microscopy;the influence of intramolecular hydrogen bonds on the phase behavior was studied as well.
基金Project supported by the National Natural Science Foundation of China.
文摘Of organic compounds,nitronic esters are a group of unusual compounds.Accordingto their chemical formula（R<sub>1</sub>R<sub>2</sub>C=NO<sub>2</sub>R<sub>3</sub>）,they might be formally obtained fromcondensation of aci-nitro compounds（intronic acids）and alcohols with an equivalentamount of water eliminated.In fact,neither could nitronic esters be produced by thismethod,nor could they be hydrolyzed into nitronic acids and alcohols.Since they
