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Updated: Jun 1, 2026

Facile Preparation of (2Z,4E)-Dienamides by the Olefination of Electron-deficient Alkenes with Allyl Acetate
Published on: June 21, 2017
(4-Methyl-phen-yl)[1-(4-methyl-phen-yl)-3-(5-nitro-2-fur-yl)-1H-pyrazol-4-yl]methanone
Abstract:
In the title pyrazole compound, C(22)H(17)N(3)O(4), an intra-molecular C-H⋯O contact generates a seven-membered ring, producing an S(7) ring motif. The furan and pyrazole rings are essentially planar [maximum deviations = 0.004 (1) and 0.004 (2) Å, respectively] and are almost coplanar, making a dihedral angle of 3.75 (10)°. One of the methyl-phenyl groups is inclined to the pyrazole ring, as indicated by the dihedral angle of 48.41 (9)°. In the crystal structure, mol-ecules are linked into chains along [10] by C-H⋯O contacts. The crystal structure is further stabilized by π-π inter-actions [centroid-centroid distance = 3.4437 (10) Å].
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