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The title compound, C31H29N or PhCH2(Et)NC6H4CH=CHCH=CPh2, was synthesized by the Wittig-Horner reaction between 4-(N-benzyl-N-eth­yl)amino­benzaldehyde and the phospho­nate carbanion, derived from 1,1-diphenyl-3-chloro­propyl­ene and triethyl phosphite by the Arbuzov reaction. The butadiene fragment has a planar transoid conformation.

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The title compound, C36H31N, was synthesized by the Wittig reaction of 1,1-diphenyl-3-cholopropyl­ene and 4-[N,N-bis­(4-methyl­phen­yl)amino]benzaldehyde. The butadiene structure has a planar transoid conformation.

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The title compound, C37H33N, was synthesized by the Wittig-Horner reaction of 4-(N,N-dibenzyl­amino)-2-methyl­benz­aldehyde and the phospho­nate carbanion, derived from 1,1-diphenyl-3-chloro­propyl­ene and triethyl phosphite by the Arbuzov reaction. The butadiene fragment has a planar cisoid conformation, while the two benzyl fragments are almost parallel to each other, forming a dihedral angle of 9.8 (2)°.
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