Acylation des α-chloromethylphosphonatesde dialkyle par voie carbanionique. Preparation de phosphonates α-chlores β-carbonyles
作者:Marie Paule Teulade、Philippe Savignac、Elie Elia Aboujaoude、Noël Collignon
DOI:10.1016/0022-328x(85)87250-8
日期:1985.5
condensation of carbanions of α-chloro-α-lithiated phosphonates with carbonyl precursors gives direct access to α-chlorine-β-carbonyl phosphonates. The reactions with ethyl formate, dimethylformamide, carboxylic esters, diethyl carbonates, diethyl oxalates etc. are discussed. In each case the intermediates have been identified.
α-
氯代-α-
锂化
膦酸酯的碳负离子与羰基前体的缩合可直接获得α-
氯-β-羰基
膦酸酯。讨论了与
甲酸乙酯,二甲基甲酰胺,
羧酸酯,
碳酸二乙酯,
草酸二乙酯等的反应。在每种情况下,均已鉴定出中间体。