Aminopyrazoles. Part 3. Synthesis of the novel ring systems pyrazolo[4′,3′:5,6]pyrido[2,3-b][1,5]benzoxazepine and [1,5]benzothiazepine

Two-step synthesis of the novel fused heterocycles pyrazolo4′,3′:5,6]pyrido2,3-b]1,5]benzoxazepine ( 8 ) and pyrazolo4′,3′:5,6]pyrido2,3-b]1,5]benzothiazepine ( 9 ) from the pyrazolo3,4-b]pyridine derivative 1 is described.