Investigation of nitrogen- and sulfur-containing heterocycles. 39. Reactions of 2-mercapto-3-ureido- and 2-mercapto-3-aminopyridines with ?-halo carbonyl compounds. Synthesis of 6-oxo derivatives of pyrido[2,3-b][1,5]thiazepines
Investigation of nitrogen- and sulfur-containing heterocycles. 39. Reactions of 2-mercapto-3-ureido- and 2-mercapto-3-aminopyridines with ?-halo carbonyl compounds. Synthesis of 6-oxo derivatives of pyrido[2,3-b][1,5]thiazepines