The syntheses of (Z)-6-heneicosen-ll-one, the principal component of the sex attractant of the Douglas fir tussock moth, and the corresponding E isomer are described. The stereochemistries of the products were determined by selective reductions of the common intermediate, 6-heneicosyn-11-01. The lower limits of isomeric purity of the products, determined by gas chromatographic analysis of the corresponding epoxides, was> 97 and ...
