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Updated: Apr 29, 2026

Facile Preparation of 2Z,4E-Dienamides by the Olefination of Electron-deficient Alkenes with Allyl Acetate
Published on: June 21, 2017
(1E,4E)-1,5-Bis[4-(di-ethyl-amino)-phen-yl]penta-1,4-dien-3-one
Pumsak Ruanwas1, Suchada Chantrapromma2, Hazem A Ghabbour3
1Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand.
Abstract:
There are two crystallograpically independent mol-ecules in the asymmetric unit of the title bis-chalcone derivative, C25H32N2O. Both mol-ecules are twisted with a dihedral angle between the two substituted benzene rings of 11.19 (16)° in one mol-ecule and 14.40 (15)° in the other. The central penta-1,4-dien-3-one fragments make dihedral angles of 8.49 (17) and 4.26 (17)° with the two adjacent benzene rings in one mol-ecule, whereas the corresponding values are 8.42 (16) and 6.18 (16)° in the other. In the crystal, mol-ecules are arranged into chains along the c-axis direction. Adjacent chains are inter-linked by weak inter-molecular C-H⋯O inter-actions. The crystal is further stabilized by C-H⋯π inter-actions.
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