Heterogeneous Rh and Rh/Ag bimetallic nanoparticle catalysts immobilized on chiral polymers
作者:Hyemin Min、Hiroyuki Miyamura、Tomohiro Yasukawa、Shū Kobayashi
DOI:10.1039/c9sc02670c
日期:——
chiral Rh and Rh/Ag bimetallic nanoparticle catalysts consisting of polystyrene-based polymers with chiral diene moieties. The catalysts enable high-to-excellent yields and enantioselectivities to be obtained in asymmetric 1,4-addition reactions of arylboronic acids with α,β-unsaturated carbonyl compounds such as ketones, esters, and amides, and in other asymmetric reactions. The catalysts could be readily
尽管具有均质手性催化剂的优点,例如对可持续社会的环境友好性,但其发展远远落后于均质手性催化剂。我们在本文中描述了由具有手性二烯部分的聚苯乙烯基聚合物组成的新型多相手性Rh和Rh / Ag双金属纳米颗粒催化剂。该催化剂能够在芳基硼酸与α,β-不饱和羰基化合物(如酮,酯和酰胺)的不对称1,4-加成反应中以及在其他不对称反应中获得高至优异的收率和对映选择性。催化剂可以很容易地通过简单的过滤回收并重复使用。它们也可以应用于连续流合成。我们还将讨论基于XPS分析的可能反应物种的性质。