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
关键词:
摘要: Abstract In order to further delimit the scope of application diphenylphosphonium diylides, their reactivity towards carbonic acid derivatives was investigated. Non-stabilized diylides react with ethyl carbonate give new monoylide intermediates which lead, by in situ Wittig reaction carbonyl compounds, synthesis α,β-unsaturated esters or acids double bond being di- trisubstituted. The proceeds mild conditions and high E stereoselectivity. Stabilized are inactive carbonates but semi-stabilized leading non-functionalized alkenes instead acids.
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