D. Geffken et S. Geisel, CONVERSION OF N-ARYLGLYCOLOHYDROXAMIC ACIDS TO 1,2,3-OXATHIAZOLIDIN-4-ONE 2,2-DIOXIDES, Journal of heterocyclic chemistry, 31(6), 1994, pp. 1473-1475
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.