𝔖 Bobbio Scriptorium
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New benzoxazine and benzothiazine dyes

✍ 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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✍ Francesco Chioccara; Giuseppe Prota; Ronald H. Thomson πŸ“‚ Article πŸ“… 1975 πŸ› Elsevier Science 🌐 French βš– 154 KB

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-

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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.

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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