Treatment of 4-substituted aroyl azides (cf. 1a-e) with NaBH4/TFA lead
s to the corresponding, novel 4-substituted N,N-di(2,2,2-trifluoroethy
l)aniline derivatives (2a-e) in excellent yield except where electron-
withdrawing groups are present (cf. If g). Copyright (C) 1996 Elsevier
Science Ltd