(Fluorocarbethoxymethylene) tri-n-butylphosphorane (3) reacts with acid chlorides and anhydrides to form the corresponding carbon acylated phosphonium salts 4, and hydrolysis of 4 under mild basic conditions provides RCOCFHCOOEt (8) in moderate yields. The reaction is applicable to primary, secondary, tertiary, cyclic, aromatic, and ester-substituted acid chlorides. Acylation with ethyl chloroformate and ethyl chlorothioformate leads to the ...
[Engman, Mattias; Diesen, Jarle S.; Paptchikhine, Alexander; Andersson, Pher G. Journal of the American Chemical Society, 2007 , vol. 129, # 15 p. 4536 - 4537]
