Anhydrous KF/alumina in dipolar aprotic solvents was found to be an effective promoter in the synthesis of α-heterosubstituted Weinreb amide prepared from 2-chloro-N-methoxy-N-methylacetamide. This method is highly yielding, even for weak nucleophiles, and requires no aqueous workup.
在合成由 2-
氯-N-甲氧基-N-甲基乙酰胺制备的δ-异构 Weinreb 酰胺的过程中,发现无
水 KF/氧化铝在双极性非沸腾溶剂中是一种有效的
促进剂。这种方法产量高,即使是对弱亲核物也是如此,而且不需要
水处理。