2-Chloro-4-(1H-pyrazol-1-yl)-5-(trifluoromethyl)pyrimidine
نویسندگان
چکیده
The reaction of 2,4-dichloro-5-(trifluoro-meth-yl)pyrimidine with 1H-pyrazole gave two structural isomers in a 1:1 ratio that were separable by chromatography. The title compound, C(8)H(4)ClF(3)N(4), was the first product to elute and was characterized in the present study to confirm that substitution by the pyrazolyl group had occurred at position 4. The mol-ecule (with the exception of the F atoms) is essentially planar, with a mean deviation of 0.034 Å from the least-squares plane through all non-H and non-F atoms. The bond angles in the pyrimidine ring show a pronounced alternating pattern with three angles, including those at the two N atoms being narrower, and the remaining three wider than 120°.
منابع مشابه
4-(4-Chloro-5-methyl-3-trifluoromethyl-1H-pyrazol-1-yl)-6-(prop-2-ynyloxy)pyrimidine
The molecule of the title compound, C(12)H(8)ClF(3)N(4)O, is twisted as indicated by the C-O-C-C torsion angle of 76.9 (3)°. Moreover, the trifluoro-methyl group shows rotational disorder of the F atoms, with site-occupancy factors of 0.653 (6) and 0.347 (6). The dihedral angle between the rings is 1.88 (12) Å.
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عنوان ژورنال:
دوره 66 شماره
صفحات -
تاریخ انتشار 2010