Cationic Palladium Complex-catalyzed Cyclization–Hydrosilylation of 1-Alkene-6,11-diyne Derivatives: Facile Cyclization at the Enyne Part than at the Diyne Counterpart
作者:Takamitsu Shimamoto、Tomohiro Hirano、Hiroyuki Nishimoto、Keiji Yamamoto
DOI:10.1246/cl.2006.846
日期:2006.8
A palladium complex, [(η3-C3H5)Pd(cod)]+[PF6]− (C), catalyzes hydrosilylation of 1-dodecene-6,11-diyne (5) or 1-tridecene-6,11-diyne (7), and of their 9-oxo congeners (9 or 11), with HSiCl3 to form regioisomeric cyclization products (6, 8, 10, and 12, respectively), which arise between the diyne part (path a) to form A series or between the enyne counterpart (path b) to form B series. The formation of product B is markedly favored with 1-tridecene-6,11-diyne derivatives as compared with 1-dodecene-6,11-diyne ones that possess a terminal alkyne.
钯络合物 [(η3-C3H5)Pd(cod)]+[PF6]− (C) 催化 1-十二烯-6,11-二炔 (5) 或 1-十三烯-6,11-二炔 ( 7) 及其 9-氧同系物 (9 或 11) 与 HSiCl3 形成区域异构环化产物 (分别为 6、8、10 和 12),其在二炔部分 (路径 a) 之间产生,形成 A 系列或在烯炔对应物(路径b)之间形成B系列。与具有末端炔烃的1-十二碳烯-6,11-二炔衍生物相比,1-十三碳烯-6,11-二炔衍生物明显有利于产物B的形成。