Cyclization via Carbolithiation of α-Amino Alkyllithium Reagents
作者:Robert J. Bahde、Scott D. Rychnovsky
DOI:10.1021/ol801523r
日期:2008.9.18
We report a newroute to tertiary alpha-amino stereocenters by sequential alkylation of alpha-amino nitriles followed by reductive lithiation of the nitrile and cyclization onto an alkene. Reductive lithiation of alpha-amino nitriles using lithium 4,4'-di-tert-butylbiphenylide (LiDBB) and subsequent intramolecular carbolithiation proceeded with modest to high diastereoselectivity to deliver cyclic