Carbon-Acylation with Carboxylic-Diphenylphosphinic Anhydrides

Abstract
The reaction of carboxylic acids with chlorodiphenylphosphinite1 in the presence of tertiary amines has been shown to yield moderately stable mixed anhydrides (I) (Equation 1) which are effective N-acylating agents in peptide synthesis. We now report the utility of such anhydrides for carbon acylation leading to ketones and acylmalonic esters.