CHEMISTRY AND SYNTHESIS OF SOME DIHYDRO-2 Hl, 4-BENZOTHIAZINE DERIVATIVES
RN Prasad, K Tietje
Index: Prasad,R.N.; Tietje,K. Canadian Journal of Chemistry, 1966 , vol. 44, p. 1247 - 1258
Full Text: HTML
Citation Number: 18
Abstract
The formation of 3-oxo-3, 4-dihydro-2 H-1, 4-benzothiazine (III a) by cyclization of alkyl 2- haloacetamidophenyl sulfides (I) was investigated; it is proposed that the reaction proceeds via a six-membered sulfonium halide. The preparation of 4-alkyl derivatives of III a and of 4- alkyl and 4-acyl derivatives of its reduction product 3, 4-dihydro-2 H-1, 4-benzothiazine (V a) is described. Acylation of V a was shown to proceed without opening of the thiazine ring. ...
Related Articles:
[Holland, Herbert L.; Turner, Carl D.; Andreana, Peter R.; Nguyen, Doan Canadian Journal of Chemistry, 1999 , vol. 77, # 4 p. 463 - 471]
Eliminative ring fission of 4-acyl-2, 3-dihydro-4H-1, 4-benzothiazines
[Babudri, F.; Florio, S.; Indelicati, G.; Trapani, G. Journal of Organic Chemistry, 1983 , vol. 48, # 22 p. 4082 - 4087]
Eliminative ring fission of 4-acyl-2, 3-dihydro-4H-1, 4-benzothiazines
[Babudri, F.; Florio, S.; Indelicati, G.; Trapani, G. Journal of Organic Chemistry, 1983 , vol. 48, # 22 p. 4082 - 4087]