Two new stilbenoids, cis-e-viniferin (3) and 2b,14b-dehydro-bisresveratrol (4) were synthesized by photooxida-tion reaction of trans-e-viniferin (2) prepared from trans-resveratrol (1). Pentamethoxyl trans-e-viniferin...Two new stilbenoids, cis-e-viniferin (3) and 2b,14b-dehydro-bisresveratrol (4) were synthesized by photooxida-tion reaction of trans-e-viniferin (2) prepared from trans-resveratrol (1). Pentamethoxyl trans-e-viniferin (5) and pentamethoxyl cis-e-viniferin (6) were also obtained by methylation of trans-e-viniferin (2) with (MeO)2SO2. Their structures were elucidated on the basis of spectral evidence. Compounds 3 and 4 showed potent inhibition of TNF-a at concentrations of 10-5 molL-1 with inhibitory ratios of 51.43% and 36.64%, respectively.展开更多
The objective was to isolate,elucidate and analyze the bioactive chemicals from the tuber of Arundina graminifolia(Dai Monority Medicine).The compounds were extracted by 95%alcohol and isolated by column chromatograph...The objective was to isolate,elucidate and analyze the bioactive chemicals from the tuber of Arundina graminifolia(Dai Monority Medicine).The compounds were extracted by 95%alcohol and isolated by column chromatography on silica gel,Sephedax LH-20 and ODS.The structures were determined by UV,IR,NMR and MS spectra.展开更多
A new bibenzyl derivative 1, named 2-(4''-hydroxybenzy1)-3-(3'-hydroxyphenethy1)-5-methoxy-cyclohexa-2,5-diene-1,4- dione, and two known stilbenoids (2, 3) were isolated from the tubers of Pleione bulbocodioi...A new bibenzyl derivative 1, named 2-(4''-hydroxybenzy1)-3-(3'-hydroxyphenethy1)-5-methoxy-cyclohexa-2,5-diene-1,4- dione, and two known stilbenoids (2, 3) were isolated from the tubers of Pleione bulbocodioides (Franch.) Rolfe. Their structures were elucidated by spectroscopic methods.展开更多
A new tetrastilbene named carasinol D (1) was isolated from the roots of Caragana sinica. Its structure was elucidated by spectroscopic analysis. Compound 1 was obtained from carasinol B (2) by an acid-catalyzed c...A new tetrastilbene named carasinol D (1) was isolated from the roots of Caragana sinica. Its structure was elucidated by spectroscopic analysis. Compound 1 was obtained from carasinol B (2) by an acid-catalyzed conversion.展开更多
基金Project supported by the National Natural Science Foundation of China (No. 30070889).
文摘Two new stilbenoids, cis-e-viniferin (3) and 2b,14b-dehydro-bisresveratrol (4) were synthesized by photooxida-tion reaction of trans-e-viniferin (2) prepared from trans-resveratrol (1). Pentamethoxyl trans-e-viniferin (5) and pentamethoxyl cis-e-viniferin (6) were also obtained by methylation of trans-e-viniferin (2) with (MeO)2SO2. Their structures were elucidated on the basis of spectral evidence. Compounds 3 and 4 showed potent inhibition of TNF-a at concentrations of 10-5 molL-1 with inhibitory ratios of 51.43% and 36.64%, respectively.
基金supported by National Natural Science Foundation of China(No.81473422)the Fundamental Research Funds for the Central Universities(SCUT-2015zz051)
文摘The objective was to isolate,elucidate and analyze the bioactive chemicals from the tuber of Arundina graminifolia(Dai Monority Medicine).The compounds were extracted by 95%alcohol and isolated by column chromatography on silica gel,Sephedax LH-20 and ODS.The structures were determined by UV,IR,NMR and MS spectra.
文摘A new bibenzyl derivative 1, named 2-(4''-hydroxybenzy1)-3-(3'-hydroxyphenethy1)-5-methoxy-cyclohexa-2,5-diene-1,4- dione, and two known stilbenoids (2, 3) were isolated from the tubers of Pleione bulbocodioides (Franch.) Rolfe. Their structures were elucidated by spectroscopic methods.
基金This project is supported by the National Natural Science Foundation of China (No. 39270800);the Major Subject of the Science and Technology Commission of Shanghai Municipality (No. 06DZ19709).
文摘A new tetrastilbene named carasinol D (1) was isolated from the roots of Caragana sinica. Its structure was elucidated by spectroscopic analysis. Compound 1 was obtained from carasinol B (2) by an acid-catalyzed conversion.