Reaction of biindone with amines and diazonium salts

ABSTRACT

The biindone I reacted with morpholine or piperidine and formaldehyde to give the corresponding Mannich bases IIa-b. Treatment of I with formaldehyde, and formaldehyde in AcOH, afforded II and IV, respectively. Compounds V and VI were prepared by treating I with benzaniline and isatinanil, respectively. Coupling of I with benzenediazonium chloride led to the formation of VII