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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
(E)-1-(2,5-Dichloro-3-thien-yl)-3-[4-(dimethyl-amino)phen-yl]prop-2-en-1-one
Abstract:
In the title compound, C(15)H(13)Cl(2)NOS, the benzene and thio-phene rings make a dihedral angle of 10.8 (1)°. The dimethyl-amino substituent and the α,β-unsaturated carbonyl group are almost coplanar with respect to the aromatic ring, forming dihedral angles of 4.73 (3)° and 5.0 (2)°, respectively. In the crystal structure, mol-ecules are connected into two-dimensional layers by weak C-H⋯Cl hydrogen bonds and C-Cl⋯O [Cl⋯O = 3.073 (2) Å] inter-actions. These layers are stacked with short C(meth-yl)-H⋯π contacts betweeen the layers.
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