申请人:Hoechst Aktiengesellschaft
公开号:US03969348A1
公开(公告)日:1976-07-13
6-Methyl-3,4-dihydro-1,2,3-oxathiazin-4-one-2,2-dioxide or the nontoxic salts thereof is prepared by reacting 6-methyl-2,3-dihydro-1,3-oxazin-2,4-dione-3-sulfo-fluoride of the formula ##EQU1## with at least 1 mole water per mole of fluoride to obtain acetoacetamide-N-sulfo-fluoride with splitting off of CO.sub.2, treating the acetoacetamide-N-sulfofluoride with an aqueous and/or alcoholic base and isolating the oxathiazinone or the salts thereof.
6-甲基-3,4-二氢-1,2,3-噁嗪-4-酮-2,2-二氧化物或其无毒盐可通过将式为##EQU1##的6-甲基-2,3-二氢-1,3-噁唑-2,4-二酮-3-磺酰氟与每摩尔氟化物至少1摩尔的水反应,分解二氧化碳,处理得到乙酰乙酰胺-N-磺酰氟,再用水和/或醇基处理乙酰乙酰胺-N-磺酰氟,并分离出噁嗪酮或其盐。