5- Aryl-4-hydroxy-3 -isothiazolone

The formation of methyl(benzylsulfonyl)oxamate 70 as the reactive intermediate in the reaction of arylmethanesulfamide 69 and diethyl oxalate, giving 5-aryl-4-hydroxy-3(2f/)-isothiazolone 71, has been reported (99MI1). 

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