Preparation and Properties of 1,1-Diaryl-1,3-butadienes.

Abstract

The amine elimination from the methiodides of N,N-dimethyl-4,4- diaryl-3-butenylamines is shown to be an efficient route to the highly reactive 1,1-diaryl-1,3-butadienes. The intermediate amines are obtained by Grignard reaction of γ-dimethylaminopropylmagnesium chloride with a benzophenone and subsequent dehydration of the benzhydrols obtained. 18 Diarylbutadienes were prepared by application of the method; the physical properties of the new compounds including the ultraviolet absorption spectra are discussed.