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Title: Synthesis and characterization of some 2-(1-phenyl-3- (thiophen-2-yl)- 1H-pyrazol-4-yl)- 4H-chromon-4-ones, 4-(2-hydroxyphenyl)- 6-(1-phenyl-3-(thiophen-2-yl)- 1H-pyrazol-4-yl)pyrimidine -2-(1H)-thione, 2-(5-(1-phenyl-3- (thiophen-2-yl)-1H-pyrazol-4-yl)- 1H-pyrazol-3-yl)phenol and 2-(2,3-dihydro-2-(1-phenyl-3- (thiophen-2-yl)-1H-pyrazol-4-yl)- benzo[b][1,4] thiazepin-4-yl)-phenol
Authors: More, M S
Shingare, M S
Kale, S B
Dalvi, N R
Karale, B K
Keywords: Thianyl pyrazoles;Pyrazolyl chromones;Pyrazolyl thiazepins;Pyrazolyl pyrimidines
Issue Date: Feb-2008
Publisher: CSIR
IPC Code: Int.Cl.⁸C07C
Abstract: Oxidative cyclization of 1 with DMSO-I₂ yields 2-(1-phenyl-3-(thiophen-2-yl)-1H- pyrazol-4-yl)-4H-chromon-4-one 2. Compound 2 reacts with thiourea in the presence of potassium hydroxide to form 4(2-hydroxyphenyl)-6- (1-phenyl-3-(thiophen-2-yl)-1H- pyrazol-4-yl)pyrimidine-2-(1H)-thione 3. Compound 2 is refluxed in ethanol with hydrazine hydrate and KOH to afford 2-(5-(1-phenyl-3-(thiophen-2-yl)- 1H-pyrazol-4-yl)- 1H-pyrazol-3-yl)phenol 4. Compound 1 when treated with 2-amino thiophenol affords 2-(2,3-dihydro-2-(1-phenyl-3- (thiophen-2-yl)-1H-pyrazol-4-yl)- benzo[b][1,4]thiazepin-4-yl)-phenol 5.
Page(s): 360-365
ISSN: 0376-4699
Appears in Collections:IJC-B Vol.46B(02) [February 2007]

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