Synergistic Interplay of a Non-Heme Iron Catalyst and Amino Acid Coligands in H<sub>2</sub>O<sub>2</sub>Activation for Asymmetric Epoxidation of α-Alkyl-Substituted Styrenes
作者:Olaf Cussó、Xavi Ribas、Julio Lloret-Fillol、Miquel Costas
DOI:10.1002/anie.201410557
日期:2015.2.23
Highly enantioselective epoxidation of α‐substituted styrenes with aqueous H2O2 is described by using a chiral iron complex as the catalyst and N‐protected amino acids (AAs) as coligands. The amino acids synergistically cooperate with the iron center in promoting an efficient activation of H2O2 to catalyze epoxidation of this challenging class of substrates with good yields and stereoselectivities
通过使用手性铁络合物作为催化剂,使用N-保护的氨基酸(AAs)作为大分子配体,描述了使用水为H 2 O 2的α-取代的苯乙烯的高度对映选择性环氧化。氨基酸与铁中心协同作用,以促进H 2 O 2的有效活化,从而在较短的反应时间内以良好的收率和立体选择性(高达97%ee)催化这种具有挑战性的底物的环氧化 。