The reaction of 3-substituted-4-hydroxyroxy-2H-1,2-be~othiazine 1,l-dioxides with aryl isocyanate under different equivalents of strong base NaH was studied. Seventeen of new derivatives were obtained whose structures were characterized by ' H NMR, IR, MS, elementary analysis and FeCls test. ## Key
โฆ LIBER โฆ
New synthesis of 3-substituted 7-nitro-2H-1,2- benzothiazine-1,1-dioxides: Potential precursors for dyestuffs and optical whiteners
โ Scribed by R. Rajagopal; S.I. Bhatia; S. Seshadri
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 557 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0143-7208
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