[3 + 2] Cycloaddition on Carbohydrate Templates: Stereoselective Synthesis of Pyrrolidines
作者:Shuting Cai、Bala Kishan Gorityala、Jimei Ma、Min Li Leow、Xue-Wei Liu
DOI:10.1021/ol103119u
日期:2011.3.4
diastereoselectivities and good yields via a [3 + 2] cycloaddition of a tert-butyldimethylsilyl protected carbohydrate-based allene with a diverse range of imines. The subsequent removal of the carbohydrate auxiliary afforded a variety of pyrrolidines with excellent enantioselectivities (up to 99% ee). Selective reduction of the pyrrolidines further demonstrated the potential of this strategy.
通过[3 + 2]叔丁基二甲基甲硅烷基保护的碳水化合物基丙二烯与各种亚胺的[3 + 2]环加成反应,可以高非对映选择性和高收率制备吡咯烷衍生物。随后除去碳水化合物助剂,得到具有优异对映选择性(高达99%ee)的各种吡咯烷。吡咯烷的选择性还原进一步证明了该策略的潜力。