作者:Helmut Poleschner、Matthias Heydenreich、Dieter Martin
DOI:10.1055/s-1991-28425
日期:——
Cyclic Ethers as Educts for the Synthesis of Lepidoptera Pheromones Ï-Iodo(trialkylsiloxy)alkanes 2 prepared by ring opening of cyclic ethers with iodotrimethylsilane, are useful starting materials for the synthesis of pheromone components. Reaction with triphenylphosphine to give the corresponding Wittig reagent and subsequent coupling with lithium (Z)-dihex-1-enylcuprate gives (Z)-alken-1-ols 5 and 7, after deprotection, in good yields. The direct coupling of 2 with alkynes failed because of competition reactions, however, the more stable Ï-iodo-1-(tert-butyldimethylsiloxy)alkanes were able to undergo C,C-coupling with alkynes. The thus formed 1-(tert-butyldimethylsiloxy)-5-decyne (13c) was hydrogenated and deprotected to give (E)-5-decen-1-ol (15c).
环醚作为合成鳞翅目昆虫信息素的起始物 — 由环醚与碘三甲基硅烷开环制备的Ï-碘(三烷基硅氧基)烷烃2,是合成信息素成分的有用起始材料。与三苯基膦反应生成相应的Wittig试剂,随后与锂(Z)-二己-1-烯基铜酸盐偶联,经过脱保护步骤后得到(Z)-烯-1-醇5和7,收率良好。直接将2与炔烃偶联失败,因为存在竞争反应,然而,更稳定的Ï-碘-1-(叔丁基二甲基硅氧基)烷烃能够与炔烃进行C,C-偶联。由此形成的1-(叔丁基二甲基硅氧基)-5-癸炔(13c)经过氢化和脱保护后生成(E)-5-癸烯-1-醇(15c)。