A Cationic Iridium-catalyzed C(sp<sup>3</sup>)–H Silylation of 2-Alkyl-1,3-azoles at the α-Position in the 2-Alkyl Group Leading to 2-(1-Silylalkyl)-1,3-azoles
作者:Masaya Hirano、Yoshiya Fukumoto、Nao Matsubara、Naoto Chatani
DOI:10.1246/cl.171137
日期:2018.3.5
The regioselective silylation of the α-C(sp3)–H bond in the 2-alkyl group in 2-alkyl-1,3-azole derivatives with hydrosilanes, catalyzed by the combination of (POCOPtBu)IrHCl and NaBArF4, leading to the production of 2-(1-silylalkyl)-1,3-azoles is described. The presence of 3,5-dimethylpyridine is required for the reaction to procced. Although the reaction takes place both in the presence and absence of a hydrogen acceptor, the addition of an acceptor gave better results, in terms of the efficiency of the reaction.
描述了在2-烷基-1,3-氮杂环衍生物中,利用氢硅烷对2-烷基的α-C(sp3)–H键进行选择性硅化的过程,该反应由(POCOPtBu)IrHCl和NaBArF4的组合催化,产物为2-(1-硅烷烷基)-1,3-氮杂环。反应需要存在3,5-二甲基吡啶。尽管在有无氢受体的情况下反应均可进行,但加入受体后反应的效率更高。