Alkylation of dienediolates from unsaturated carboxylic acids with allylic halides when followed by solventless thermal treatment at 150 to 200° C afford rearranged products on a trend highly dependent on the α carbon substitution. Thus, 2, 2-bisallylated acids with H atoms at C-2 lead to its 1, 3-shift, whereas 2-methyl-2, 2-bisallylated acids lead to the corresponding Cope rearrangement product. In the latter case, this tandem allylation- ...
