Highly Regio- and Enantioselective Reductive Coupling of Alkynes and Aldehydes via Photoredox Cobalt Dual Catalysis
作者:Yan-Lin Li、Shi-Qi Zhang、Jie Chen、Ji-Bao Xia
DOI:10.1021/jacs.1c03527
日期:2021.5.19
A Co-catalyzed highly regio- and enantioselective reductive coupling of alkynes and aldehydes has been developed under visible light photoredox dual catalysis. A variety of enantioenriched allylic alcohols have been obtained by using unsymmetrical internal alkynes and commercially available catalyst, chiral ligand, and reagents. It is noteworthy that this approach has considerable advantages, such
在可见光光氧化还原双催化下开发了一种共催化的炔烃和醛的高度区域选择性和对映选择性还原偶联。通过使用不对称内部炔烃和市售催化剂、手性配体和试剂,已经获得了多种对映体富集的烯丙醇。值得注意的是,这种方法具有相当大的优势,例如出色的区域-(> 40 个示例> 95:5)、立体-(高达> 95:5 E / Z)和对映选择性(92-99% ee,> 35个例子)控制,反应条件温和,底物范围广,官能团相容性好,使其对映选择性炔-醛还原偶联反应有了很大的改进。
Rhodium-Catalyzed Branched and Enantioselective Direct α-Allylic Alkylation of Simple Ketones with Alkynes
作者:Liyu Xie、Haijian Yang、Mingliang Ma、Dong Xing
DOI:10.1021/acs.orglett.0c00375
日期:2020.3.6
first direct branched-selective α-allylic alkylation of simple ketones with alkynes under rhodium and secondary amine cooperative catalysis. Through a rhodium-hydride-catalyzed allylic substitution pathway, a series of valuable γ,δ-unsaturated ketones are obtained with excellent regioselectivity in an atom-economic and byproduct-free manner. With a chiral BIPHEP ligand, high enantioselectivity has been
Asymmetric Coupling of β-Ketocarbonyls and Alkynes by Chiral Primary Amine/Rh Synergistic Catalysis
作者:Jie Zhang、Yaning Wang、Chang You、Mingying Shi、Xueling Mi、Sanzhong Luo
DOI:10.1021/acs.orglett.1c04334
日期:2022.2.11
We herein report a synergetic chiral primaryamine and rhodium catalysis for asymmetric coupling of β-ketocarbonyls and alkynes. A series of β-ketocarbonyls could be applied to afford linear allylation products, bearing all-carbon quaternary centers in high regio- and enantioselectivities.
In accordance with the present invention, compounds that inhibit viral replication, preferably Hepatitis C Virus (HCV) replication, have been identified, and methods for their use provided. In one aspect of the invention, compounds useful in the treatment or prevention of a viral infection are provided. In another aspect of the invention, compounds useful in the treatment or prevention of HCV infection are provided.