Photocatalyzed multiple additions of amines to .alpha.,.beta.-unsaturated esters and nitriles
作者:Suresh Das、J. S. Dileep Kumar、K. George Thomas、K. Shivaramayya、M. V. George
DOI:10.1021/jo00082a021
日期:1994.2
Photoelectron-transfer-catalyzed intermolecular carbon-carbon bond formation of primary, secondary, and tertiary amines with alpha,beta-unsaturated esters and nitriles using photosensitizers such as anthraquinone, acridone, and dicyanoanthracene has been investigated. The addition of alpha-aminoalkyl radicals, generated via photoelectron-transfer processes, to olefinic substrates and the subsequent 1,5-hydrogen abstraction reactions of the amine-olefin adduct radicals lead to a number of interesting multiple-olefin-added products. The adducts of the primary and secondary amines with alpha beta-unsaturated esters undergo further cyclizations to give spiro and cyclic lactams, respectively.