The sydnone ring as an ortho-director of lithiation. 2.1 Dilithiation of 3-phenylsydnone and regiospecific -aryl acylation using N-methoxy-N-methylamides
作者:Kenneth Turnbull、Congcong Sun、Douglas M. Krein
DOI:10.1016/s0040-4039(98)00069-0
日期:1998.3
Readily available 3-phenylsydnone (1) reacts with n-butyllithium/TMEDA to form the dilithio species 2 which can be regiospecifically acylated at the ortho-aryl position using N-methoxy-N-methylamides (Weinreb's amides). (C) 1999 Elsevier Science Ltd. All rights reserved.