We describe a cerium‐catalyzed aerobic oxidative ringexpansion for the expedient construction of synthetically challenging macrolactones under visible‐light conditions. Cyanoanthracene has been employed as co‐catalyst to accelerate the turnover of the cerium cycle leading to a fast conversion within 20 min of irradiation. Taking advantage of the high efficiency and operationally simple conditions
Facile homogeneous hydrogenations of hindered olefins with [Ir(cod)py(PCy3)]PF6
作者:J.William Suggs、S.D. Cox、Robert H. Crabtree、Jennifer M. Quirk
DOI:10.1016/0040-4039(81)80081-0
日期:1981.1
The title complex readily hydrogenates a number of hindered steroidal olefin groups from the α face, without reducing ketone carbonyl groups, carbon—halogen bonds or cyclopropane rings.