Studies on 2, 5-Diaryl-2, 4-dihydro-3H-pyrazol-3-ones. I. Synthesis of Highly Substituted 1H-Indazoles Using Tautomeric 2, 5-Diaryl-2, 4-dihydro-3H-pyrazol-3-ones

The reaction of 2-aryl-5-phenyl-2, 4-dihydro-3H-pyrazol-3-ones (1) with acetone gave 2-aryl-4-(1-methylethylidene)-5-phenyl-2, 4-dihydro-3H-pyrazol-3-ones (2) in nearly quantitative yields, and these products reacted further with acetone in the presence of triethylamine (NEt3) as a catalyst to give...

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Veröffentlicht in:	Chemical & pharmaceutical bulletin 1984/06/25, Vol.32(6), pp.2146-2153
Hauptverfasser:	MATSUGO, SEIICHI, SAITO, MITSUO, KATO, YOHKO, TAKAMIZAWA, AKIRA
Format:	Artikel
Sprache:	eng
Schlagworte:	Chemistry Diels-Alder reaction Exact sciences and technology Heterocyclic compounds Heterocyclic compounds with several n hetero atoms in the same ring, in separated rings or in fused rings Organic chemistry Preparations and properties
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