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Updated: May 27, 2026

A Two-Step Protocol for Umpolung Functionalization of Ketones Via Enolonium Species
Published on: August 16, 2018
Ethyl 3-(4-chloro-phen-yl)-1-(2-oxo-2-phenyl-eth-yl)-1H-pyrazole-5-carboxyl-ate
Liang-Wen Zheng1, Yin-Rui Liu, Bao-Xiang Zhao
1School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China.
Abstract:
In the title compound, C(20)H(17)ClN(2)O(3), the dihedral angles between the pyrazole ring and the substituted and unsubstituted benzene rings are 3.64 (13) and 81.15 (17)°, respectively. Mol-ecules are connected via three pairs of weak hydrogen bonds into a centrosymmetric dimer. The crystal structure is stabilized by inter-molecular C-H⋯O and C-H⋯π inter-actions.
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