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Quinoline analog 2-aryl-4H-3,1-benzothiazine derivatives 8–13, obtained by the condensation of o-aminobenzyl chloride 1 with substituted thiobenzamides 2–7, were transformed to azeto[2,1-a][3,1]benzothiazin-1-one derivatives 18–23a,b,c and 24d,e by reaction with the corresponding substituted acetyl chlorides 14–17 in the presence of triethylamine. The structures of the new molecules were determined...
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