The addition of diethyl phosphite to cyclic imines bearing alkyl, aryl, or heteroaryl substituents at the α-position in diethyl ether at room temperature presents an efficient route to substituted cyclic α-aminophosphonates. The application of boron trifluoride-diethyl ether complex as a catalyst significantly accelerates the reaction. diethyl phosphonate - cyclic imines - addition reactions - α-aminophosphonates
Synthesis of chiral cyclic amines via Ir-catalyzed enantioselective hydrogenation of cyclic imines
作者:Ying Zhang、Duanyang Kong、Rui Wang、Guohua Hou
DOI:10.1039/c7ob00442g
日期:——
A highly enantioselective hydrogenation of cyclic imines for synthesis of chiral cyclic amines has been realized. With the complex of iridium and (R,R)-f-spiroPhos as the catalyst, a range of cyclic 2-aryl imines were smoothly hydrogenated under mild conditions without any additive to provide the corresponding chiral cyclic amines with excellent enantioselectivities of up to 98% ee. Moreover, this