An oxidative rearrangement of C,N-diarylaldimines to formamides using sodium perborate
作者:Pakawan Nongkunsarn、Christopher A. Ramsden
DOI:10.1016/s0040-4039(00)61698-2
日期:1993.10
Treatment of C,N-diaryladium (5) with sodium tetrahydrate in triflouroacetic acid solution at 70–80°C results in an oxidative rearrangement to N,N-diarylformamides (6(Scheme 1). A mechanism involving the initial formation of 2,3-diaryloxaziridines is proposed (Scheme 2).
Several amides were obtained in high yields by an efficient method from the corresponding imines which are readily prepared from aldehydes. This procedure involves the oxidation of aldimines with m-CPBA and BF3.OEt2. In this reaction, the product is strongly influenced by the electron releasing capacity of the aromatic substituent. (C) 2003 Elsevier Science Ltd. All rights reserved.