期刊
ACS CATALYSIS
卷 10, 期 2, 页码 1161-1170出版社
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.9b04595
关键词
dirhodium tetracarboxylate; donor/acceptor carbene; enantioselective cyclopropanation; reaction progress kinetic analysis; low catalyst loadings
资金
- NSF [CHE 1531620, CHE 1626172, CHE 1465189]
- NSF under the CCI Center for Selective C-H Functionalization [CHE-1700982]
Dirhodium tetracarboxylates are versatile catalysts for the reactions of donor/acceptor carbenes. They catalyze a variety of transformations, including enantioselective intermolecular cyclopropanations. This study is focused on understanding the kinetics of the rhodium-catalyzed cyclopropanation, and this information was used to develop conditions for conducting the reactions with very low catalyst loadings. The enantioselective cyclopropanation of styrenes can be conducted with a catalyst loading of 0.001 mol % and still maintain high levels of enantioselectivity (86-99% ee). A triarylcyclopropanecarboxylate (TPCP) catalyst, Rh-2(p-Ph-TPCP)(4), was the optimum catalyst for maintaining high enantioselectivity with very low catalyst loading. The reaction also benefited from using dimethyl carbonate as the solvent, an environmentally benign and nontoxic material.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据