The addition of several acid halides to dimethylketen to produce β-keto-acid halides is described. A correlation exists between the reactivity of the acid halide and the pKa of the acid from which the acid from which the acid halide is derived. Dimethylketen is more reactive than diphenyl- and phenylethyl-keten. This is not a general reaction of keten and acid halides.
W. T. Brady and L. Smith, J. Chem. Soc. C, 1970, 2522 DOI: 10.1039/J39700002522
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