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Syntheses of thieno[2,3-b][1,4]thiazine, 1,4-benzoxazine and 1,4- benzothiazine derivatives with ion channel antagonistic activity
The syntheses of the thieno[2,3-b][1,4]thiazine derivatives 8 and 9 are described. Reaction of compound 4 with different acyl halides followed by substitution with various ethanamines gave the products 8 and 9. The new 3,4- dihydro-2H-1,4-benzoxazine derivatives 14, 16, 18 and 3,4-dihydro-2H-1,4- benzothiazine derivatives 15 and 17 with an urea moiety have been synthesized. Substitution of 10 respectively 11 with 4-nitrophenyl chloroformate gave the required reactivity for substitution with diamines. Structural modifications of the amino side chain were carried out.
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Reference£º
Thiazine – an overview | ScienceDirect Topics,
Thiazine | C4H5NS – PubChem