Whereas various substituted 1,4-benzoxasines have been described,2 the parent compound, which theoretically may exist either in the enamine (la) or the cyclic imine (lb) form, is still unknown. In an attempt to obtain (1) by an unambiguous and simple route, sodium g-nitro-
New benzoxazine and benzothiazine dyes
β Scribed by F. Chioccara; G. Prota; R.H. Thomson
- Book ID
- 103398071
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- French
- Weight
- 271 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0040-4020
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π SIMILAR VOLUMES
The 'H and 13C N M R spectra of a series of benzoxazine, benzothiazine and quinazoline nitrate esters were measured and assigned on the basis of substituent chemical shifts and 13C1/H shift correlated experiments.
The compounds cis-5a,6,11a,12-tetrahydro[1,4]benzothiazino [3,2-b][1,4]benzothiazine (BTB) and 5a,6,11a,12-tetrahydro[1,4]benzoxazino [3,2-b][1,4]benzoxazine(BOB) have been studied by oxygen bomb combustion calorimetry and by the Knudsen effusion method using a quartz-crystal microbalance. Based on
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