A New Ligand Design Based on London Dispersion Empowers Chiral Bismuth–Rhodium Paddlewheel Catalysts
作者:Santanu Singha、Michael Buchsteiner、Giovanni Bistoni、Richard Goddard、Alois Fürstner
DOI:10.1021/jacs.1c01972
日期:2021.4.21
exhibit outstanding levels of selectivity in reactions of donor/acceptor and donor/donor carbenes; at the same time, the reaction rates are much faster and the substrate scope is considerably wider than those of previous generations of chiral [BiRh] catalysts. As shown by a combined experimental, crystallographic, and computational study, the new catalysts draw their excellent application profile largely
异双金属铋铑桨轮配合物与在芳环间位带有 TIPS 基团的苯基甘氨酸配体在供体/受体和供体/供体卡宾反应中表现出出色的选择性;同时,与前几代手性[BiRh]催化剂相比,反应速率更快,底物范围更广。综合实验、晶体学和计算研究表明,新型催化剂的优异应用特性很大程度上来自于外围甲硅烷基取代基的伦敦色散 (LD) 相互作用对手性配体球的稳定作用。