Highly Regioselective Synthesis of Substituted Isoindolinones<i>via</i>Ruthenium-Catalyzed Alkyne Cyclotrimerizations
作者:Robert W. Foster、Christopher J. Tame、Helen C. Hailes、Tom D. Sheppard
DOI:10.1002/adsc.201300055
日期:2013.8.12
uthenium chloride [Cp*RuCl(cod)] has been used to catalyze the regioselective cyclization of amide-tethered diynes with monosubstituted alkynes to give polysubstituted isoindolinones. Notably, the presence of a trimethylsilyl group on the diyne generally led to complete control over the regioselectivity of the alkyne cyclotrimerization. The cyclization reaction worked well in a sustainable non-chlorinated
(环辛二烯)(五甲基环戊二烯)氯化钌 [Cp*RuCl(cod)] 已用于催化酰胺系二炔与单取代炔烃的区域选择性环化反应,得到多取代的异吲哚啉酮。值得注意的是,二炔上三甲基甲硅烷基的存在通常导致对炔环三聚反应的区域选择性的完全控制。环化反应在可持续的非氯化溶剂中运行良好,并且耐湿。优化的条件适用于各种炔烃和二炔烃。7-甲硅烷基异吲哚啉酮产品可以被卤化、脱甲硅烷基化或开环以获得一系列有用的功能化产品。