A ring expansion method for the preparation of 2,3-dihydro-1,4-benzothiazines from 2-aryl-2,3-dihydrobenzothiazoles
β Scribed by Sabir H. Mashraqui; Richard M. Kellogg
- Publisher
- Elsevier Science
- Year
- 1985
- Tongue
- French
- Weight
- 215 KB
- Volume
- 26
- Category
- Article
- ISSN
- 0040-4039
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π SIMILAR VOLUMES
6,7-Dimethoxy-2-phenyl-4H-l,3-benzothiazine (la) was oxidized with hydrogen peroxide to yield [2,2'-bis(benzoyIaminomethyl)-4,4',5,5'-tetramethoxyldiphenyl disulfide (2). Potassium permanganate oxidation of Aa gave 6,7-dimethoxy-2-phenyl-4B-1,3benzothiazinll-one (5a), wKch was oxidized with the calc
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