Preparation and stereochemistry of some 1,1-disubstituted buta-1,3-dienes
Abstract
The preparation of five (E)- and five (Z)-1,1-disubstituted buts-1,3-dienes is described and their stereochemistry assigned. The effect of the ZāE isomerism on the chemical shifts in the 13C and 1H n.m.r. spectra is discussed.