Insect phermones and their analogues XXXIX. Synthesis of 11RS-hydroxy- and 12-hydroxydodec-3Z-enoic acids — Acyclic precursors of the macrolide components of the pheromones of Cryptolestes ferrugineus and C. pusillus

A new approach to the synthesis of 11RS-hydroxy- and 12-hydroxydodec-3Z-enoic acids has been developed with the use, in one of the key stages, of the partial ozonolysis of the acetates of the corresponding methylene-separated enynic alcohols.