Document Type and Number:
Japanese Patent JPS572711
Kind Code:
B2
Abstract:
6-Methyl-3,4-dihydro-1,2,3-oxathiazine-4-one-2,2-dioxide is prepared by reacting an acetoacetic acid tert. alkyl ester with fluorosulfonyl-isocyanate, optionally in the presence of an aprotic diluent, transforming the addition compound obtained into the acetoacetic acid amide-N-sulfofluoride by splitting off carbon dioxide and alkene at 60 DEG to 100 DEG C. and effecting cyclization of the fluoride with aqueous lye.
Application Number:
JP14458673A
Publication Date:
January 18, 1982
Filing Date:
December 27, 1973
Export Citation:
International Classes:
C07D291/06
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