C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/243
C07D 291/06 (2006.01)
Patent
CA 1283913
-1- Abstract of the disclosure: Process for ?he preparation of the non-toxic salts of 6-methyl-3,4-dihydro-1,2,3-oxathiazin-4-one 2,2-dioxide The non-toxic salts of 6-methyl-3,4-dihydro-1,2,3-oxa- thiazin-4-one 2,2-dioxide are prepared by cyclizing aceto- acetamide-N-sulfonic acid or its salts with an at least approximately equimolar amount of SO3 in the presence of a water-immiscible, inert organic solvent and, if appropriate, also an inert inorganic solvent, hydrolyzing the 6-methyl-3,4-dihydro-1,2,3-oxathiazin-4-one 2,2-di- oxide obtained in the form of the SO3-adduct after the cyclization reaction, in the event that the amount of SO3 employed is more than equimolar, purifying the organic phase (which has separated out) by extraction with a small volume of water or dilute aqueous sulfuric acid, prefer- ably only with water, and isolating, by neutralization with bases, the non-toxic salts of the 6-methyl-3,4-di- hydro-1,2,3-oxathiazin-4-one 2,2-diox;de from the organic phase thus purified. The said salts are obtained in this process in an extremely pure form; they are valuable synthetic sweetening agents. The potassium salt is known as acesulfam (K).
517246
Ebertz Wolfgang
Linkies Adolf
Mack Karl Ernst
Reimann Walter
Reuschling Dieter
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Hoechst Aktiengesellschaft
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