Reductive deprotection of allyl, benzyl and sulfonyl substituted alcohols, amines and amides using a naphthalene-catalysed lithiation
摘要:
The reaction of different protected alcohols, amines and amides with lithium and a catalytic amount of naphthalene (4 mol %) in THF at low temperature leads to their deprotection under very mild reaction conditions, the process being in many cases chemoselective. (C) 1997 Elsevier Science Ltd.
A new synthetic entry to the 1,4-dihydroquinoline nucleus is reported. The procedure involves the dimethyltitanocene methylenation of N-(alkoxycarbonyl)amides derived from 2-allylanilines, followed by ring-closing metathesis of the resulting enamides. (c) 2005 Elsevier Ltd. All rights reserved.