Crystal structure of 1-phenyl-1 <i>H</i> -pyrazolo[3,4- <i>d</i> ]pyrimidin-4(5 <i>H</i> )-one
Nilufar AkhmedovaS. Yunusov Institute of the Chemistry of Plant Substances Academy of Sciences of Uzbekistan Mirzo Ulugbek Str 77 Tashkent 100170 UzbekistanИ. С. ОртиковAlfraganus University, Yukori Korakamysh str., 2, Tashkent 100190, UzbekistanNilufar KhasanovaAlfraganus University, Yukori Korakamysh str., 2, Tashkent 100190, UzbekistanKosim O. ZokhidovSamarkand State University, 15, University blv., 140104, Samarkand, UzbekistanK. K. TurgunovTurin Polytechnic University in Tashkent Kichik Khalka yuli str 17 100095 Tashkent UzbekistanBurkhon ElmuradovS. Yunusov Institute of the Chemistry of Plant Substances Academy of Sciences of Uzbekistan Mirzo Ulugbek Str 77 Tashkent 100170 Uzbekistan
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Heating of 5-amino-1-phenyl-1 H -pyrazole-4-carbonitrile in the presence of formic acid yielded the title compound, C 11 H 8 N 4 O. The pyrazolo[3,4- d ]pyrimidine ring system forms a dihedral angle of 34.72 (6)° with the phenyl ring. In the crystal, classical N—H...O and non-classical C—H...O and C—H...N intermolecular interactions result in the formation of supramolecular bands extending parallel to the a axis. Additional π...π interactions between pyrimidine and pyrazole rings, and C—H...π interactions between neighboring phenyl rings consolidate the packing.
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