Enantioselective Imine Reduction of Dihydro-β-carbolines by Fe-Thiosquaramide Catalyst
作者:Manda Sathish、Fabiane M. Nachtigall、Leonardo S. Santos
DOI:10.1021/acs.orglett.2c03093
日期:2022.10.21
Enantioselective imine reduction of dihydro-β-carbolines (DHBCs) is a reliable and powerful tool to construct bioactive chiral tetrahydro-β-carbolines (THBCs). Here, we report an efficient enantioselective imine reduction employing in situ generated Fe-thiosquaramides (Fe-TSQs) 3a and 3b as asymmetric organometallic catalysts to produce chiral THBCs (2a–h). The catalyst 3a at 15 mol % was found to
二氢-β-咔啉 (DHBC) 的对映选择性亚胺还原是构建具有生物活性的手性四氢-β-咔啉 (THBC) 的可靠且强大的工具。在这里,我们报告了一种有效的对映选择性亚胺还原,采用原位生成的 Fe-thiosquaramides (Fe-TSQs) 3a和3b作为不对称有机金属催化剂来生产手性 THBC ( 2a – h )。发现 15 mol%的催化剂3a适用于具有烷基和芳基的底物,这些底物提供具有优异对映选择性(高达 ee 99%)的相应手性 THBC。