6-Methyl-2H-1,3-oxazin-2,4(3H)dione-3-sulfohalides

Details 6-Methyl-2H-1,3-oxazin-2,4(3H)dione-3-sulfohalides 6-Methyl-2H-1,3-oxazin-2,4(3H)dione-3-sulfohalides

1975-07-16

1977-02-22

Waddell, Frederick E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D265100, C07D27300, C07D29500

Patent

active

040091619

ABSTRACT:
3-Sulfohalides of 6-methyl-2H-1,3-oxazin-2,4(3H)-dione of the formula I ##STR1## in which X represents fluorine or chlorine are prepared by reacting fluorosulfonyl isocyanate or chlorosulfonyl isocyanate, at a temperature of from -35.degree. to +70.degree. C, optionally in the presence of an inert solvent, with diketene, acetoacetyl fluoride, acetoacetyl chloride, acetoacetic acid or an isopropenyl ester of the formula CH.sub.2 =C(OOCR)-CH.sub.3 in which R represents an alkyl radical having from 1 to 4 carbon atoms, a substituted or unsubstituted phenyl or benzyl radical.

REFERENCES:
patent: 3394132 (1968-07-01), Martin et al.
Derwent Report--(70/31,663; 70/37,018 -- Abstracts of Japanese Specifications).

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