Crystal structure of 2,5-diethoxy-1,4-bis[2-(quinoline)ethenyl]benzene, C₃₂H₂₈N₂O₂

Abstract

CCDC no.: 1427061The crystal structure is shown in the gure. Tables 1-3 contain details of the measurement method and a list of the atoms including atomic coordinates and displacement parameters. Source of materialThe title compound was synthesized by solid-phase Wittig reaction. 2,5-Diethoxy-1,4-bis(triphenylphosphonium)benzene dichloride (1.18 g, 1.5 mmol) and quinoline-2-carbaldehyde (0.63 g, 4 mmol), fresh t-BuOK (1.12 g, 10 mmol) were crashed together with a pestle and mortar at room temperature for 0.5 h. Then, the product was puri ed silicagel column chromatography (8:1 v/v petroleum/ethyl acetate) in 52% yield as yellow solid. Single crystals of the title compound suitable for X-ray analysis were obtained from CH 3 CN solvent.

Crystal structure of 4,4′-((1Z,1′Z)-2,2′-(2,5-diethoxy-1,4-phenylene)bis(ethene-2,1-diyl))dipyridine, C24H24N2O2

“…the figure). The bond length of C = C double bond is 1.3402(16) Å which is slightly longer than those in the related compound [4]. The torsion angles between the double bond and two adjacent phenyl rings are 131.72(10)°and 131.22(10)°.…”

“…The title compound was synthesized according to procedures described in the literature for an analogous compound [4]. 2,5-Diethoxy-1,4-bis(triphenylphosphonium)benzene dichloride (1.18 g, 1.5 mmol) and isonicotinaldehyde (0.43 g, 4 mmol), fresh t-BuOK (1.12 g, 10 mmol) were crashed together with pestle and mortar at room temperature for 0.5 h. Separation of cis-and trans-isomers was accomplished by radial chromatography technique using a Chromatotron apparatus and petroleum/ethyl acetate (20:1) as the eluting solvent.…”