A new abietane quinone diterpenoid was isolated, together with horminone, 16-acetoxy-7-O-acetylhorminone, beta-sitosterol, stigmasterol. ursolic acid and palmitic acid from the leaves of Rabdosin Serra (MAXIM) Hara. T...A new abietane quinone diterpenoid was isolated, together with horminone, 16-acetoxy-7-O-acetylhorminone, beta-sitosterol, stigmasterol. ursolic acid and palmitic acid from the leaves of Rabdosin Serra (MAXIM) Hara. The new compound was elucidated as 16-acetoxy-7 alpha-ethoxyroyleanone.展开更多
A novel diastereoselective route to (+)-a-cyperone(1) and (-)-10-epi-a-Cyperone(2) hasbeen developed. The key step involves an asymmetric Michael addition of the correSPonding chiralimine, derived from R-(+)-dihydroca...A novel diastereoselective route to (+)-a-cyperone(1) and (-)-10-epi-a-Cyperone(2) hasbeen developed. The key step involves an asymmetric Michael addition of the correSPonding chiralimine, derived from R-(+)-dihydrocarvone(3), to ethyl vinyl ketone.展开更多
Three kinds of products have been separated from the reaction mixtures of 1,2-dihydro-2, 4-disubstituted-1,5-benzodiazepine with: CCI_2.Besides the addition products of: CCI_2 to C=N.the inserted products of: CCI_2 to...Three kinds of products have been separated from the reaction mixtures of 1,2-dihydro-2, 4-disubstituted-1,5-benzodiazepine with: CCI_2.Besides the addition products of: CCI_2 to C=N.the inserted products of: CCI_2 to N-H and C-H single bonds were obtained, too.展开更多
文摘A new abietane quinone diterpenoid was isolated, together with horminone, 16-acetoxy-7-O-acetylhorminone, beta-sitosterol, stigmasterol. ursolic acid and palmitic acid from the leaves of Rabdosin Serra (MAXIM) Hara. The new compound was elucidated as 16-acetoxy-7 alpha-ethoxyroyleanone.
文摘A novel diastereoselective route to (+)-a-cyperone(1) and (-)-10-epi-a-Cyperone(2) hasbeen developed. The key step involves an asymmetric Michael addition of the correSPonding chiralimine, derived from R-(+)-dihydrocarvone(3), to ethyl vinyl ketone.
文摘Three kinds of products have been separated from the reaction mixtures of 1,2-dihydro-2, 4-disubstituted-1,5-benzodiazepine with: CCI_2.Besides the addition products of: CCI_2 to C=N.the inserted products of: CCI_2 to N-H and C-H single bonds were obtained, too.
