Palladium-catalyzed coupling of N-tosylhydrazones and β-bromostyrene derivatives: new approach to 2H-chromenes
作者:Yamu Xia、Ying Xia、Yan Zhang、Jianbo Wang
DOI:10.1039/c4ob01979b
日期:——
structural motif that exists in natural products and non-natural compounds possessing interesting biological activities. In this investigation, a highly efficient approach toward 2H-chromenes has been developed based on palladium-catalyzedcoupling of N-tosylhydrazones and β-bromostyrenes. The mechanism of this reaction is proposed that involves the formation of vinyl palladium by carbene migratory insertion
2 H -Chromene是存在于天然产物和具有有趣生物活性的非天然化合物中的重要结构基序。在这项研究中,基于钯催化的N-甲苯磺酰hydr和β-溴苯乙烯的偶联,已经开发出一种高效的2 H-苯甲基苯胺的方法。提出了该反应的机理,该机理涉及通过卡宾迁移插入和分子内亲核取代形成乙烯基钯。
Catalytic Enantioselective Synthesis of 2-Aryl Chromenes and Related Phosphoramidite Ligands and Catalyst Compounds
申请人:Northwestern University
公开号:US20150315168A1
公开(公告)日:2015-11-05
Methods to access 2-aryl chromene compounds via an asymmetric catalytic process.
通过不对称催化过程访问2-芳基色素化合物的方法。
Kinetic Resolution and Dynamic Kinetic Resolution of Chromene by Rhodium‐Catalyzed Asymmetric Hydroarylation
作者:Qingjing Yang、Yanbo Wang、Shihui Luo、Jun (Joelle) Wang
DOI:10.1002/anie.201900721
日期:2019.4.8
A highly efficient kineticresolution and dynamickineticresolution of chromene is reported for the first time and they procced by a rhodium‐catalyzed asymmetric hydroarylation pathway. This new approach offers versatile access to various chiral 2,3‐diaryl‐chromanes containing vicinal stereogenic centers, as well as the recovered chiral flavenes, in high yields with excellent ee values (s factor up