Diastereoselective metal-catalyzed [4 + 2 + 2] carbocyclization reactions utilizing a rhodium N-heterocyclic carbene (NHC) complex: the first example of a rhodium NHC-catalyzed [m+n+o] carbocyclization
作者:P. Andrew Evans、Erich W. Baum、Aleem N. Fazal、Maren Pink
DOI:10.1039/b413438a
日期:——
The air and moisture stable rhodium N-heterocyclic carbene (NHC) complex, RhCl(IMes)(COD)
(IMes =
N,N′-bis(2,4,6-trimethylphenyl)imidazole-2-ylidine; COD = 1,5-cyclooctadiene), facilitates a diastereoselective metal-catalyzed [4 + 2 + 2] carbocyclization of 1,6-enynes in the presence of silver triflate and 1,3-butadiene.
空气和水分稳定的铑N-杂环卡宾(NHC)络合物RhCl(IMes)(COD)(IMes = N,N′-双(2,4,6-三甲基苯基)咪唑-2-基;COD = 1,5-环辛二烯)在存在三氟化银和1,3-丁二烯的情况下,促进1,6-烯炔的金属催化[4 + 2 + 2]碳环化反应。