Synthesis of Z-isomeric insect sex pheromone components via ethenolysis of 1,5-cyclooctadiene
作者:Victor I Bykov、Tamara A Butenko、Elena B Petrova、Eugene Sh Finkelshtein
DOI:10.1016/s0040-4020(99)00295-1
日期:1999.7
A novel syntheses of Z-5-decenol, Z-5-decenyl acetate, Z-7-dodecenol, Z-7-dodecenyl acetate, Z-9-tricosene, Z-7,8-epoxy-2-methyloctadecane which are sex pheromone components of Lepidoptera and Diptera orders, have been realized via stereoselective cometathesis of 1,5-cyclooctadiene with ethylene in the presence of MoCl5/SiO2-SnMe4 as a key reaction. The main cometathesis product, 1,Z-5,9-decatriene, has been converted into pheromone components mentioned above by regioselective partial hydroboration or hydrozirconation with help of 9-BBN and Cp2ZrHCl, correspondingly. The protonolysis of the obtained zirconosene derivative gave 1,Z-5-decadiene. Hydroboration-oxidation or hydroboration-Cz-homologation of the latter led to Z-5- or Z-7 monoene pheromone components. Hydroboration-iodination of terminal double bond in 1,Z-5,9-decatriene, and further cross-coupling of the obtained iodine derivative with convenient lithium cuprates resulted in Z-9-tricosene, the main sex pheromone component of House Fly ( Musca Domestica), or in 2-methyl-Z-7-octadecene, the precursor of Gypsy Moth (Lymantria Dispar) sex attractant. (C) 1999 Elsevier Science Ltd. All rights reserved.