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Title: Synthesis of some new 1-(6-fluorobenzothiazol-2-yl)- 3-(4-fluoro- phenyl)-5-arylpyrazolines and their iodine(III) mediated oxidation to corresponding pyra-zoles
Authors: Aggarwal, Ranjana
Kumar, Vinod
Singh, Shiv P
Keywords: Fluorinated chalcones;Pyrazolines;Iodobenzene diacetate;Pyrazoles;NMR spectroscopy
Issue Date: Aug-2007
Publisher: CSIR
Abstract: The reaction of fluorinated chalcones 2 and 6-fluorobenzothiazol-2-ylhydrazine 1 in presence of catalytic amount of glacial acetic acid in refluxing ethanol yields 1-(6-fluorobenzothiazol-2-yl)-3- (4-fluorophenyl)-5-arylpyrazolines 3, which undergo facile oxidation to the corresponding pyrazoles 4 in good yield using iodobenzene diacetate (IBD). The structures of the synthesized compounds have been established on the basis of their elemental analysis, MS and ¹H and ¹³C NMR spectroscopy.
Page(s): 1332-1336
ISSN: 0376-4699
Appears in Collections:IJC-B Vol.46B(08) [August 2007]

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