potassium disilazide as the base gives (Z)-3-alkenoate predominantly. A trail-followingpheromone for subterraneantermites is synthesized stereoselectively with this method. Deconjugative protonation of trienolates from (E,E)-2,4-tetradecadienoates gives (E,Z)-3,5-tetradecanoates which is hydrolyzed to give Megatomoic acid, a sex pheromone for a black carpet beetle Attagenus megatoma.
Isomerization of acetylenic acids with sodium salt of 1,2-diaminoethane: a one step synthesis of megatomoic acid
作者:S. R. Abrams
DOI:10.1139/v82-182
日期:1982.5.15
isomeric tetradecynoic acids were isomerized with the sodium salt of 1,2-diaminoethane. Isomers having the triple bond near the carboxyl group rearranged to E,Z-3,5- and E,E-3,5-tetradecadienoic acids (1 and 2), the former compound being the sex pheromone of the blackcarpetbeetle. Isomers having the triple bond closer to the terminus of the chain afforded some 13-tetradecynoic acid along with 1 and 2
5Z)-3,5-alkadienoate was conveniently separated, by the use of urea inclusion complex formation. The importance of this procedure has been illustrated by the preparation of the (3E,5Z)-3,5-tetradecadienoic acid (megatomoic acid) 1, the (3E,5Z)-3,5-dodecadienyl acetate 2, and the (3E,5Z)-3,5-tetradecadienyl acetate 3. These compounds are the main components of insect sexpheromones and constitute synthetic
Short-route synthesis of (3E,5Z)-tetradecadienoic acid (megatomic acid), the sex attractant of the black carpet beetle
作者:Jhillu S. Yadav、Etukala Jagan Reddy、Tallapali Ramalingam
DOI:10.1039/b007956l
日期:——
A new and expeditious route to (3E,5Z)-3,5-tetradecadienoic acid (megatomic acid), the sexattractant of the blackcarpetbeetle Attagenus megatoma (Fabricius), is reported which proceeds with 97% stereoselectivity; Cadiot–Chodkiewicz cross-coupling of 1-decyne and 4-bromo-3-butyn-1-ol in the presence of CuCl, followed by stereoselective reductions and Jones oxidation, gives the target molecule, with
SLOW-RELEASE FORMULATION CONTAINING GEL COMPOSITION FOR USE ON PESTS
申请人:Shin-Etsu Chemical Co., Ltd.
公开号:EP2805615A1
公开(公告)日:2014-11-26
Provided is a sustained release preparation comprising an insect pest-targeting gel composition, the preparation being free from leakage or reaction of a volatile substance and being capable of releasing the volatile substance at a constant rate. More specifically, provided is a sustained release preparation comprising a polymer tube and an insect pest-targeting gel composition in the polymer tube, the composition comprising one or more volatile substances and an oil gelling agent, wherein the volatile substances are comprised in an amount of from 70.0 to 99.0% by weight by the insect pest-targeting composition and are released outside of the polymer tube through the polymer tube.