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Chemistry of Substituted Quinolinones VII. Utility in Syntheses and Reactions of 3-[4-(Chromen-3-ylmethylene)pyrazolin-3-yl]quinolin-2(1H)-ones with Some Bidentate Nucleophiles

M. Abass and A. Hassan

Department of Chemistry, Faculty of Education, Ain Shams University, Roxy, Cairo 11711, Egypt

 

E-mail: mohamedabass@hotmail.com

Received: 10 June 2002  Accepted: 27 January 2003

Abstract: Condensation of 3-formylchromenes with pyrazolinylquinolinone afforded the chromenylmethylenepyrazolinones. The reactivity of these products towards different bidentate heteroatom nucleophiles, viz. hydrazine, quinolinylhydrazine, hydroxylamine, ketene-S,S-acetal, sulfanylacetic acid, cyanthioacetamide, thiourea, guanidine, thiobarbituric acid, 2-aminothiophenol, and 4-aminotriazole-3-thiol, was investigated at different mole ratios and reaction conditions. Versatile novel heteropolycyclic systems were obtained as substituents at the 3-pyrazolinylquinolinone moiety derived from nucleophilic ring opening of chromene.

Full paper in Portable Document Format: 574a267.pdf

 

Chemical Papers 57 (4) 267–277 (2003)

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