SN2′ regio and stereoselective alkylation of allylic mesylates linked to a N-Boc oxazolidine using organocuprates
作者:Claude Agami、François Couty、Hélène Mathieu、Carole Pilot
DOI:10.1016/s0040-4039(99)00800-x
日期:1999.6
N-Boc-oxazolidines bearing an allylic alcohol chain were transformed into their mesylate derivatives. A regio and stereoselective 1,3-transfer of chirality was effected on these mesylates during their alkylation by mean of organocuprate additions The resulting N-Boc-2-alkenyl oxazolidines undergo an intramolecular bromocarbamoylation with a high level of stereocontrol upon treatment with NBS and afford