Turkish Journal of Chemistry p. 859 - 867 (2010)
Update date:2022-07-30
Topics:
Korkusuz, Elif
Yildirim, Ismail
The 1H-pyrazole-3-carboxylic acid 2 was converted via reactions of its acid chloride 3 with various hydroxylamine 4a-f and carbazate derivatives 8a-c into the corresponding novel N-substituted-4-benzoyl-1,5-dipenyl-1 H-pyrazole-3-carboxamides 5a-c, N, N-disubstituted-4-benzoyl-1,5-diphenyl-1 H-pyrazole-3-carboxylates 6d,e, 4-benzoyl-N-{[(4-benzoyl-1,5-diphenyl-1H- pyrazol-3-yl)carbonyl]oxy}-N-methyl-1,5diphenyl-1 H-pyrazole-3-carboxamide (7), and 4-benzoyl-N′-(alkoxycarbonyl)-1,5-diphenyl-1H-pyrazole-3- carbohydrazides 9a,b and 10, respectively, in good yields (65%-90%). The reactions of 3 with 4 and 8 in xylene for 8-15 h with catalytic amounts of base led to the formation of the products 5-7, 9, and 10. The structures of all new synthesized compounds were established by the 13C-NMR, 1H-NMR, IR spectroscopic data, and elemental analyses. TUeBITAK.
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