반응식
[S:1]1([C:12]2[C:7](=[CH:8][CH:9]=[CH:10][CH:11]=2)[C:5](=O)[NH:4]1)(=[O:3])=[O:2].[C:13]1([Mg]Br)[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1>O1CCCC1>[C:13]1([C:5]2([C:7]3[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=3)[C:7]3[CH:8]=[CH:9][CH:10]=[CH:11][C:12]=3[S:1](=[O:3])(=[O:2])[NH:4]2)[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1참가 물질
실험 절차
Various procedures have been reported for synthesizing 3-substituted-benz[d]isothiazole-1,1-dioxides and 3,3-disubstituted-2,3-dihydrobenz[d]isothiazole-1,1-dioxides from saccharin (3-oxo-2,3-dihydrobenz[d]isothiazole-1,1-dioxide) and from saccharin pseudo-chloride (3-chlorobenz[d]isothiazole-1,1-dioxide). As reported by A. Mustafa et al., J. Chem. Soc., 1952, p. 1339, the treatment of saccharin pseudo-chloride with excess phenylmagnesium bromide gave the corresponding 3,3-diphenyl-2,3-dihydrobenz[d]isothiazole-1,1-dioxide in almost quantitative yield. Methyl-, ethyl-, n-propyl- and n-butylmagnesium halides were reported by these authors to react analogously. R. A. Abramovitch et al, J. Chem. Soc., Perkin Trans I, 1974(22), p. 2589, reviewed and reinvestigated the reactions of saccharins with alkyl and aryl Grignard reagents and found that either the 3-alkyl (or 3-aryl)-benz[d]-isothiazole-1,1-dioxide and/or the open-chain tertiary alcohol, o--CH2OH benzenesulfonamide wherein R is alkyl (or aryl) were obtained with one exception. When saccharin was treated with an excess of phenylmagnesium bromide in boiling tetrahydrofuran, 3,3-diphenyl-2,3-dihydrobenz[d]isothiazole-1,1-dioxide was obtained as the minor product together with the open-chain tertiary alcohol.
후처리
- customto react analogously
- customwere obtained with one exception
출처 및 근거
- ORD 기록
- ord-4d5cd026d13a469fae4a0b0e431ef626
- 출처 데이터셋
- uspto-grants-1980_07
- 특허 번호
- US04210752
연결된 노트
불러오는 중…