Tetrahedron

Some aspects of 1, 4-diazaphenothiazine chemistry

SD Carter, GWH Chesseman

文献索引：Carter,S.D.; Cheeseman,G.W.H. Tetrahedron, 1977 , vol. 33, p. 827 - 832

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被引用次数: 13

摘要

Quinoxalino [2, 3-b][1, 4] benzothiazine 1 and its pyrazino-analogue 6 both give pairs of isomeric N-methyl derivatives. The N-methyl compounds 2 and 7 on oxidation with iodobenzene dichloride and other reagents give sulphoxides and sulphones (accompained by some ring substitution) but treatment of 6 with iodobenzene dichlorode gives benzothiazole-2-carboxamide 17. The action of sodium nitrite in acetic acid upon the ...