作者:Takafumi Arao、Kei Sato、Kazuhiro Kondo、Toyohiko Aoyama
DOI:10.1248/cpb.54.1576
日期:——
Function of a new N-heterocyclic carbene ligand based on the concept of a chiral mimetic is described. With (4R,5R)-4,5-diphenyl-1,3-dialkyl-4,5-dihydro-3H-imidazol-1-ium tetrafluoroborates as N-heterocyclic carbene precursors, Rh-catalyzed enantioselective arylation (up to 27% ee) of aromatic aldehydes with arylboronic acids and Pd-catalyzed enantioselective intramolecular α-arylation (up to 66% ee) of N-(2-bromoaryl)-N-alkyl-2-arylpropanamides are investigated.
描述了一种基于手性类似物概念的新型N-杂环卡宾配体的功能。以(4R,5R)-4,5-二苯基-1,3-二烷基-4,5-二氢-3H-咪唑镉四氟硼酸盐作为N-杂环卡宾前体,研究了Rh催化的芳香醛与芳基硼酸的对映选择性芳基化(最高可达27% ee)以及Pd催化的N-(2-溴芳基)-N-烷基-2-芳基丙酰胺的对映选择性分子内α-芳基化(最高可达66% ee)。