CONVERSION OF N-ARYLGLYCOLOHYDROXAMIC ACIDS TO 1,2,3-OXATHIAZOLIDIN-4-ONE 2,2-DIOXIDES

N-Arylglycolohydroxamic acids 1A are converted by in situ prepared 2,2 '-dipyridyl sulfite to 1,2,3-oxathiazolidin-4-one 2,2-dioxides 5, the formation of which can be rationalized via a radical pair mechanism. T he alkylating potential of the heterocyclic system 5 is demonstrated b y the alkaline ethanolysis giving rise to the open chained 2-ethoxypro pionanilide 6.