ChemInform Abstract: Regiospecific Synthesis of 3H-Pyrido[2,3-b][1,4]diazepin-4(5H)-ones (III) via Haloform Reaction with the Isolation of N3-[3-Oxo-4,4,4-trichloroalk-1-en-1-yl]-2,3-diaminopyridine Intermediates (IV).

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