Cationic Palladium Complex-catalyzed Cyclization–Hydrosilylation of Alkadiynes and Enynes
作者:Shigeru Wakayanagi、Takamitsu Shimamoto、Motoharu Chimori、Keiji Yamamoto
DOI:10.1246/cl.2005.160
日期:2005.2
A cationic π-allylpalladium complex, [(η3-C3H5)Pd (cod)]+[PF6]−, catalyzes hydrosilylation of 1,6-heptadiyne derivatives to form 1-methylene-2-(silylmethylene) cyclopentanes, HSiMenCl3−n (n = 0–2) being equally applicable to this cyclization–hydrosilylation. Certain 1,6-enynes react faster than 1,6-diynes under same reaction conditions, and 9-oxa-1-dodecene-6,11-diyne undergoes competitive cyclization–hydrosilylation at either diyne or enyne moiety, indicative of an unexpectedly high-reactive ene counterpart.
一种阳离子π-烯丙基钯配合物[(η3-C3H5)Pd(cod)]+[PF6]−能够催化1,6-庚二炔衍生物的氢硅化反应,生成1-亚甲基-2-(硅亚甲基)环戊烷,其中HSiMenCl3−n(n=0–2)对于这种环化-氢硅化反应同样适用。在相同的反应条件下,某些1,6-烯炔的反应速率比1,6-二炔更快,并且9-氧化-1-十二碳烯-6,11-二炔会在二炔或烯炔部分上发生竞争性的环化-氢硅化反应,表明其烯部分具有出乎意料的高反应活性。