Reductive cyclization of carbon-centered glycine radicals; a novel synthetic route to cyclic α-amino acids
作者:Peter M. Esch、Henk Hiemstra、Richard F. de Boer、W.Nico Speckamp
DOI:10.1016/s0040-4020(01)81240-0
日期:1992.1
Reductive cyclizations (tributylin hydride, AIBN) of several α-(penthylthio)glycine derivatives with a 30alkenyl substituent at nitrogen are reported. These reactions proceed via 2-aza-5-alken-1-yl radicals as intermediates which bear electron-withdrawing carbonyl substituents at the radical center and at nitrogen. Such radicals can be considered as relatively stable captodative radicals, but are reactive