utilities of the BArF (tetrakis(3,5-bis(trifluoromethyl)phenyl)borate) salts of these compounds are evaluated toward carbene-transfer reactions from ethyl diazoacetate including aldehyde olefination, cyclopropanation, and X−H (X = O, N) insertions. 1-BArF is clearly shown to be the superior catalyst. DFT calculations are undertaken to understand the influence of NHC binding on the electronic structures of the
在
金属-
金属单键合的二
钌(I)平台上实现
萘啶官能化的N-杂环卡宾(NHC)的定点锚固。用
乙腈中的Ru 2(CH 3 COO)2(CO)4室温处理1-异丙基-3-(5,7-二甲基-1,8-
萘-2-基)
咪唑溴化铵(
PIN·HBr)得到的不支持的化合物的Ru 2(CO)4(κ 2 ç 2,N 1 -
PIn)2
溴2(1)。NHC
配体的明智改变导致桥接化合物Ru 2(CO)4(CH 3 COO)(μ2 -κ 2 Ç 2,N 1 -bin)能Br(2)(BIN = 1-苄基-3-(3-苯基-1,8- naphthyrid -2-基)
咪唑-2-亚基)。X射线分析显示,每个
钌在赤道位点上的
PIN螯合结合为1,而跨越二
钌核心的BIN的桥螯合物结合为2。对这些化合物的BAr F(四(3,5-双(三
氟甲基)苯基)
硼酸酯)盐的催化效用进行了评估,以进行
重氮乙酸乙酯的卡宾转移反应,包括醛烯化,
环丙烷化和XH(X =