Reactions of 3-acetoxy-2-(2,2-dicyanovinyl)indole with hydrazine hydrate and methyl-and phenylhydrazines afforded new indolin-3-one derivatives, namely, 2-[( 3,5-diaminopyrazol-4-yl)methylidene]indolin-3-ones. Reactions of the compounds obtained with acetic anhydride and DMF and DMAA dimethyl acetals were studied. Cyclization of 2-[(3,5-diamino-1H-pyrazol-4-yl)methylidene]-1,2-dihydro-3H-indolinone gave 3-amino-1,5-dihydropyrazolo-[4',3' : 5,6]pyrido[3,2-b]indole, a representative of a novel heterocyclic system.
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Univ Delhi, Dept Chem, ARSD Coll, Organ Synth Res Lab, New Delhi 110021, IndiaUniv Delhi, Dept Chem, ARSD Coll, Organ Synth Res Lab, New Delhi 110021, India
Sharma, Nutan
Bhagat, Sunita
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Univ Delhi, Dept Chem, ARSD Coll, Organ Synth Res Lab, New Delhi 110021, IndiaUniv Delhi, Dept Chem, ARSD Coll, Organ Synth Res Lab, New Delhi 110021, India