Synthesis, structures, and catalytic reactivity of bis(N-heterocyclic carbene) supported diphenyldiazomethane and 1-azidoadamantane complexes of nickel
作者:Nicole D. Harrold、Amanda R. Corcos、Gregory L. Hillhouse
DOI:10.1016/j.jorganchem.2016.03.031
日期:2016.7
the metal in a side-bound η2-fashion. While thermolysis of 3 and 4 does not induce N2 loss to form terminal carbenes and imidos, respectively, (IMes)2Ni(κ1-N2CPh2) (3-IMes) reacts with olefins at elevated temperatures to give cyclopropane products in excellent yields. Either 3-IMes or 1-IMes can also perform this reaction catalytically with a 1:1 ratio of diphenyldiazomethane to olefin. An olefin activation
用Ni(NHC)二苯基重氮甲烷进行反应2(1,NHC = Ñ -杂环卡宾),得到式(NHC)的复合物2的Ni(κ 1 -N 2器CPh 2)(3),其中配体重氮烷结合到金属在最终上κ 1的方式。另外,1-IMES(IMES = 1,3-双(2,4,6-三甲基苯基)咪唑-2-亚基)与1- azidoadamantane发生反应(N 3 AD)以产生(IMES)2的Ni(η 2 -N 3 AD)(4),其中所述叠氮化物配体结合到所述金属中的一侧结合的η 2-时尚。虽然热解的3和4不诱导Ñ 2损失,以形成终端卡宾和imidos分别(IMES)2的Ni(κ 1 -N 2器CPh 2)(3-IMES)反应与烯烃在升高的温度下,得到的环丙烷的产品高产。或者3-IMES或1-IMES二苯基重氮甲烷与烯烃比为1:也可以与1进行催化该反应。提出了烯烃活化机理来解释环丙烷化反应。