作者:Christopher L. Friend、Nigel S. Simpkins、Michael Anson、Mario E.C. Polywka
DOI:10.1016/s0040-4020(98)83016-0
日期:1998.3
The reaction of certain types of Michael accepters, limited to those having methylene groups, with a mixture of diphenyl disulfide and phenyl silane, under the influence of 10% of the cobalt catalyst, Co(eobe) 3, results in the formation of hydro-sulfenylated products, such as alpha-phenylthio carbonyl compounds, in moderate to good yields. The process involves intermediates having radical character, judging by the 5-exo-trig cyclisation product 21 observed in the reaction of alpha,beta-unsaturated ester 20 having a suitable unsaturated sidechain. (C) 1998 Elsevier Science Ltd. All rights reserved.