Enhanced Reactivity by Torsional Strain of Cyclic Diaryliodonium in Cu-Catalyzed Enantioselective Ring-Opening Reaction
Enhanced Reactivity by Torsional Strain of Cyclic Diaryliodonium in Cu-Catalyzed Enantioselective Ring-Opening Reaction
复制标题
铜催化对映选择性开环反应中环状二芳基碘的扭转应变增强反应活性
DOI:
10.1016/j.chempr.2018.01.017
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发表时间:
2018-03
期刊:
影响因子:
23.5
通讯作者:
Zhenhua Gu
中科院分区:
文献类型:
--
作者:
Kun Zhao;Longhui Duan;Shibo Xu;Julong Jiang;Yao Fu;Zhenhua Gu
Atropisomers are stereoisomers arising from the restricted rotation around a single bond. In particular, biaryl atropisomers represent an important class of compounds, as they are widely present in natural products, ligands and pharmaceutical molecules. However, the preparation of structurally diverse biaryl atropisomers under mild conditions is a significant challenge. Here, we describe a Cu-bis(oxazolinyl)pyridine-catalyzed asymmetric ring-opening amination reaction of cyclic diaryliodoniums. Increasing the torsional strain of these cyclic compounds significantly improved the reactivity of cyclic diaryliodoniums. Computational investigation indicated that the two conformers of the cyclic diaryliodoniums had a low rotational barrier, and generally the reaction achieved high yields and high enantioselectivity (up to >99% ee). Furthermore, this ring-opening amination reaction also featured high atom economy in comparison with traditional reactions involving diaryliodonium. Finally, we propose a catalytic cycle and a mechanistic model that accounts for the observed enantioselectivity.
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影响因子:
15
作者:
Cahard E;Male HP;Tissot M;Gaunt MJ
通讯作者:
Gaunt MJ
DOI:
10.1002/chin.201007236
发表时间:
2010-02
期刊:
ChemInform
影响因子:
--
作者:
M. Kozlowski;Barbara J. Morgan;E. C. Linton
通讯作者:
M. Kozlowski;Barbara J. Morgan;E. C. Linton
影响因子:
3.9
作者:
Li, Jian;Liu, Li
通讯作者:
Liu, Li
影响因子:
15
作者:
Beaud R;Phipps RJ;Gaunt MJ
通讯作者:
Gaunt MJ
DOI:
10.1126/science.1188403
发表时间:
2010-06-04
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Gustafson JL;Lim D;Miller SJ
通讯作者:
Miller SJ