| 摘要 |
1511340 Thiophene saccharines BASF AG 15 Sept 1975 [16 Sept 1974 (3)] 37736/75 Heading C2C Novel 2,3-dihydro-3-oxothieno isothiazole- 1,1-dioxides having one of the formulµ and non-toxic water-soluble salts thereof are prepared by cyclizing a compound of the formula wherein the radicals SO 2 NHR<SP>1</SP> and COZ are attached to adjacent carbon atoms, Z is a readily eliminable functional group and R<SP>1</SP> is hydrogen or tertiary alkyl, in the presence of a condensation agent. The novel compounds may be used as sweeteners in foodstuffs. The compounds of the invention, and intermediates therefor, may be prepared by the following reaction scheme |
