1.A process for preparing functional group-containing olefinic compounds comprising the steps of:(a) reacting (1) at least one alkylidene phosphorane comprising an alkylidene moiety and three other moieties bon
Under high temperature and acidic conditions, isomerization occurs which changes the predominant all-trans carotenoids to mixed cis-trans isomers which in turn shifts the absorption spectrum of the pigment and ultimately affects the color expression of the vegetables. In contrary to this phenomenon in ...