A RAPID AND EFFICIENT SYNTHESIS OF 2H-1,4-BENZOXAZINE-3(4H)-THIONES AND 2H-1,4-BENZOTHIAZINE-3(4H)-THIONES
β Scribed by Shridhar, D. R.; Jogibhukta, M.; Krishnan, V. S. H.
- Book ID
- 121232048
- Publisher
- Taylor and Francis Group
- Year
- 1984
- Tongue
- English
- Weight
- 247 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0030-4948
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## Treatment of the hydrochloride salts of 4-chloro-5-(2halomethylaryl-imino)-5H-l,2,3-dithiazoles (2) with sodium cyanoborohydride in THF at room temperature gave 2-cyan0-4H-3,l -benzothiazines ( I ) in good to moderate yields. 2-Cyano-4H-3,l -benzoxazines (4) were obtained in good to moderate yiel