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Thermal condensation of 3-trifluoromethyl and 3-amino-1-phenyl-2-pyrazolin-5-ones with aromatic aldehydes. Synthesis of 4-arylidene-pyrazolones and pyrazolopyranopyrazoles
Journal article   Peer reviewed

Thermal condensation of 3-trifluoromethyl and 3-amino-1-phenyl-2-pyrazolin-5-ones with aromatic aldehydes. Synthesis of 4-arylidene-pyrazolones and pyrazolopyranopyrazoles

Tariq R. Sobahi
Indian journal of chemistry. Sect. B. Organic chemistry, including medicinal chemistry, Vol.45(5), pp.1315-1318
01/05/2006

Abstract

Chemistry Chemistry, Organic Physical Sciences Science & Technology
1-Phenyl-3-trifluoromethyl-2-pyrazolin-5-one 1 on heating with aromatic aldehydes at 160-70 degrees C affords the corresponding 4-arylidene-2-pyrazolin-5-ones 3, while 3-amino-1-phenyl-2pyrazolin-5-one 2 on heating with aldehydes gives pyrazolopyranopyrazole derivatives 4 with high yields. These new products have been characterized by spectroscopic techniques and elemental analysis.

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