A novel allylic hydroxylation of sterically hindered olefins by Fe-porphyrin-catalyzed mCPBA oxidation
作者:Toshiro Konoike、Yoshitaka Araki、Yasuhiko Kanda
DOI:10.1016/s0040-4039(99)01437-9
日期:1999.9
A novel allylic hydroxylation by mCPBA of triterpenes bearing stericallyhinderedolefin is catalyzed by Fe(PFPP)Cl. Oleanolic acid, ursolic acid, dihydrolanosterol and their derivatives are converted to the corresponding allylic alcohols by mCPBAFe(PFPP)Cl under mild conditions. In contrast, for common or electron-deficient olefins, mCPBAFe(PFPP)Cl is an efficient epoxidation system. The intermediacy