selectivity (up to 93 %) to a wide range of (a)chiral unsymmetrical 1‐aryl‐3‐cycloalkyl‐imidazolium salts is disclosed. Electronic and steric properties of the corresponding unsymmetrical unsaturated N‐heterocyclic carbene (U2‐NHC) ligands were evaluated and evidenced strong electron donor ability, high steric discrimination, and modular steric demand.
公开了一种低成本,模块化且易于扩展的多组分方法,可提供高收率和优异的选择性(高达93%),可用于广泛的(a)手性不对称1-芳基-3-环烷基-
咪唑鎓盐。对相应的不对称不饱和N-杂环卡宾(U 2 -NHC)
配体的电子和空间特性进行了评估,并证明了其强大的电子给体能力,高空间辨别力和模块化空间需求。