Reduction of (E,E)-(η6:η6-1,4-Diphenyl-1,3-butadiene)bis(tricarbonylchromium), Followed by Reaction with Electrophiles. A Regioselective Method for the Preparation of Substituted 1,4-Diphenylbutenes

Article abstract of DOI:10.1021/jo00262a011

Reduction of (E,E)-(η⁶:η⁶-1,4-diphenyl-1,3-butadiene)bis(tricarbonylchromium) with lithium naphthalenide followed by reaction with alkyl halides and acyl chlorides yields, after oxidative cleavage of the tricarbonylchromium groups, dialkylated and diacylated 1,4-diphenylbutenes.