Collect. Czech. Chem. Commun. 1985, 50, 2174-2178

A simple method of isomerization of the terminal double bond in a terpene chain

Ludvík Streinza, Zdeněk Wimmera, Georgii K. Roshkab, Raisa I. Ishchenkob, Miroslav Romaňuka and Boris G. Kovalevb

a Institute of Organic Chemistry and Biochemistry, Czechoslovak Academy of Sciences, 166 10 Prague 6
b All-Union Research Institute of Plant Protection, 277 060 Kishinev, U.S.S.R.


The utilisability of the isomerization of the terminal double bond in terpenic compounds with trifluoroacetic acid was investigated. The results obtained were used in the synthesis of the main part of the pheromone of Quadraspidiotus perniciosus COMSTOCK, i.e. (2E)-3,7-dimethyl-2,7-octadien-1-yl propionate.