Dual-mode cross-coupling on aromatic imino compounds by dihydridoruthenium catalysts
作者:Daisuke Hirasawa、Yuichi Watanabe、Takuma Yamahara、Kaku Tanaka、Kiyoshi Sato、Takamichi Yamagishi
DOI:10.1016/j.mcat.2017.11.015
日期:2018.6
of the substrates. By the stoichiometric reaction of N-1-(4-methylphenyl)ethylidene-4-methylbenzylamine with RuH2(CO)(PPh3)3 in the presence of three equivalents of vinylsilane, a novel ruthenium bismetallacylclic complex with two ruthenium-carbon bonds was isolated. This (C,N,C)-bismetallacycle complex was converted to the alkenylated complex by the reaction with two equiv. of vinylsilane. These observations
在由1-乙酰萘酮或苯乙酮衍生物与苄胺衍生的酮亚胺与三烷氧基乙烯基硅烷RuH 2(PPh 3)4或RuH 2(CO)(PPh 3)3催化剂的催化交叉偶联反应中,各自引起选择性的烯基化和烷基化酮亚胺的芳香环分别(即双模耦合)。烯基化发生在邻位苄基单元的位上(一个或多个)和烷基化发生在邻位的基板的1-arylethylidene部分的位上(一个或多个)。N -1-(4-甲基苯基)亚乙基-4-甲基苄胺与RuH的化学计量反应2(CO)(PPh 3)3在三当量的乙烯基硅烷存在下,分离出具有两个钌-碳键的新型钌双金属钌配合物。通过与两个当量的反应,该(C,N,C)-双金属杂环配合物被转化为烯基化的配合物。乙烯基硅烷。这些观察结果表明,双模式偶联以烯基化顺序进行,随后通过中间双金属环复合物形成而进行烷基化。