Reaction of Allylzinc Reagents and Zinc Enolates of Ketones with α-Amidoalkylphenyl Sulfones
作者:Marino Petrini、Roberto Profeta、Paolo Righi
DOI:10.1021/jo025606f
日期:2002.6.1
Alpha-amidoalkylphenyl sulfones behave as N-acylimino equivalents in the reaction with functionalized allylzinc reagents. The addition products obtained using the zinc derivative of ethyl 2-(bromomethyl)acrylate can be readily transformed into alpha-methylene-gamma-lactams using different cyclization procedures. The allylzinc reagent obtained from 3-bromo-1-acetoxy-1-propene directly affords protected
TiCl4-promoted addition of nucleophiles to open chain α-amidoalkylphenyl sulfones
作者:Marino Petrini、Elisabetta Torregiani
DOI:10.1016/j.tetlet.2005.07.031
日期:2005.9
Linear alpha-amidoalkylphenyl sulfones are converted into the corresponding N-acyliminium ions by treatment with TiCl4 at low temperature and then made to react with different nucleophiles such as allyltrimethylsilane, silyl ketene acetal, anisole and thiophene. (c) 2005 Elsevier Ltd. All rights reserved.