作者:Yuta Une、Atsushi Tahara、Yasumitsu Miyamoto、Yusuke Sunada、Hideo Nagashima
DOI:10.1021/acs.organomet.8b00835
日期:2019.2.25
thermally activated IrCl(PPh3)3 (8). Both catalysts showed excellent activity toward the selective conversion of a variety of N,N-dialkyl-, N-alkyl-N-aryl-, and N,N-diarylamides to the corresponding enamines with low catalyst loadings. The 14-electron species “ClIr(PPh3)2”, which is stabilized by solvents or reactants in the actual catalytic reactions, could be involved in the catalysis, which produces
Vaska络合物IrCl(CO)(PPh 3)2(1a)催化N,N-二烷基酰胺与TMDS反应失活机理的研究引发了高活性Ir-PPh 3催化剂的发现:光化学活化1a和热活化的IrCl(PPh 3)3(8)。两种催化剂对多种N,N-二烷基-,N-烷基-N-芳基-和N,N-的选择性转化均表现出优异的活性。二芳基酰胺制得的低催化剂负载量的相应烯胺。在实际催化反应中被溶剂或反应物稳定的14电子物种“ ClIr(PPh 3)2 ”可能参与催化反应,产生“ HIr(PPh 3)2 ”和“ Si Ir(PPh)3)2 ”(Si = Me 2 HSiOMe 2 Si-)物种在催化循环中。对于“ClIrL原位生成方法2是通过简单地[的IrCl(η混合建立”物种4 -COD)] 2与PPH 3 或其他磷配体,可轻松实现烯胺的大规模合成。