5-(4-Chlorophenyl)-1-(2,4-dichlorophenyl)-4-methyl-1H-pyrazole-3-carboxylic acid
نویسندگان
چکیده
The asymmetric unit of the title compound, C(17)H(11)Cl(3)N(2)O(2), contains two independent mol-ecules; the pyrazole rings are oriented with respect to the chloro-phenyl and dichloro-phenyl rings at dihedral angles of 43.00 (3) and 65.06 (4)°, respectively, in one mol-ecule, and 51.17 (3) and 69.99 (3)°, respectively, in the other. Pairs of inter-molecular O-H⋯O hydrogen bonds link the mol-ecules into dimers. In the crystal structure, there are π-π contacts between the pyrazole rings and dichloro-phenyl rings [centroid-centroid distances = 3.859 (3) and 3.835 (3) Å].
منابع مشابه
5-(4-Chlorophenyl)-1-(2,4-dichlorophenyl)-4-methyl-N-(3-pyridylmethyl)-1H-pyrazole-3-carboxamide
In the title compound, C(23)H(17)Cl(3)N(4)O, the benzene rings are oriented with respect to the pyrazole ring at dihedral angles of 39.9 (2) and 72.90 (13)° for the chloro-phenyl and di-chloro-phenyl rings, respectively. Inter-molecular C-H⋯N and C-H⋯Cl inter-actions are observed in the crystal packing.
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2-Amino-5-acetyl-4-methyl-thiophene-3-carboxylic acid ethyl ester (1) and 5-acetyl-2-amino-4-methylthiophene-3-carbohydrazide (2) were synthesized and used as starting materials for the synthesis of new series of 1-(5-amino-4-(3,5-dimethyl-1H-pyrazole-1-carbonyl)-3-methylthiophen-2-yl) ethanone (3a), 1-(5-amino-4-(4-chloro-3,5-dimethyl-1H-pyrazole-1-carbonyl)-3-methylthiophen-2-yl) ethanone (3b...
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عنوان ژورنال:
دوره 64 شماره
صفحات -
تاریخ انتشار 2008