Sulphonydiacetyl chloride (m.p. 69–70°) has been prepared in ca. 90% yield by chlorination of sulphonyldiacetic acid with phosphorus pentachloride in ethyl acetate at 70°. The preparation of the corresponding NNN′N′-tetraethyl and -tetraisopropyl amides has demonstrated the use of the chloride for preparing new derivatives of the parent acid.
B. M. Culbertson and R. Murphy, J. Chem. Soc. C, 1966, 968 DOI: 10.1039/J39660000968
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