Two methods of generation of new trifluoromethyl azomethine ylides are described: by heating N,N-dimethyl-bis(methylthio)-orthotrifluoroacetamide 2 or by deprotonation of trifluoromethyl thioamidium salts. Trapping by dipolarophiles leads to 2-trifluoromethyl pyrrolidines and pyrrolizidines with high diastereoselectivity.
描述了两种产生新的三
氟甲基偶氮甲
亚胺的方法:通过加热N,N-二甲基-双(甲
硫基)-原三
氟乙酰胺2或通过使三
氟甲基
硫代salts盐去质子化。亲双极性物的捕集导致具有高非对映选择性的2-三
氟甲基
吡咯烷和
吡咯嗪。