Reactivity of substituted and unsubstituted diphenylphosphonium diylides towards carbonic acids derivatives
作者:H.J. Cristau、M. Taillefer
DOI:10.1016/s0040-4020(97)10360-x
日期:1998.2
delimit the scope of application of diphenylphosphonium diylides, their reactivity towards carbonicacid derivatives was investigated. Non-stabilized diylides react with ethyl carbonate to give new monoylide intermediates which lead, by in situ Wittig reaction with carbonyl compounds, to the synthesis of α,β-unsaturated esters or acids the double bond being di- or trisubstituted. The reaction proceeds in