2-(2,2-Dihalovinyl-3,3-dimethylcyclopropyl)vinyl alkanoates in which the alkanoate moiety contains from two to six carbon atoms are new chemical compounds useful as intermediates in the preparation of certain pyrethroid acids. The alkanoates are prepared by reacting 2-(2,2-dihalovinyl-3,3-dimethylcyclopropyl)ethanal with the appropriate alkanoic acid anhydride.