New Binaphthyl-Proline-Based Chiral Ligands Bearing Imidazoline Groups: Design, Synthesis, and Their Application in Enantioselective Conjugate Addition of 4-Hydroxycoumarin and Related Nucleophiles to β,γ-Unsaturated α-Ketoesters
作者:Shibo Yu、Qihang Cai、Tianxu Yu、Jiahui Li、Chao Yao、Yue-Ming Li
DOI:10.1021/acs.joc.3c01262
日期:2023.11.3
This paper describes the design and application of new binaphthyl-proline-based chiral ligands bearing imidazoline functional groups. These chiral ligands incorporate the advantages of both the binaphthyl and proline skeletons, they are featured with regulatable electronic and steric properties for the imidazoline functional groups, and form chiral complexes with different metal salts such as cuprous
本文介绍了带有咪唑啉官能团的新型联萘脯氨酸手性配体的设计和应用。这些手性配体结合了联萘和脯氨酸骨架的优点,具有可调节咪唑啉官能团的电子和空间性质,并与不同的金属盐(例如乙酸亚铜)形成手性配合物。在适量的手性催化剂存在下,4-羟基香豆素或相关亲核试剂与不同的β,γ-不饱和α-酮酯的对映选择性共轭加成反应很容易进行,得到了高产率(高达99%)和优异的所需产物。对映体过量(高达 99%)。