Chiral Ferrocenyl P,N-Ligands for Palladium-Catalyzed Asymmetric Formal [3+2] Cycloaddition of Propargylic Esters with beta-Ketoesters: Access to Functionalized Chiral 2,3-Dihydrofurans
文献类型： 外文期刊
作者： Zhou, Yong 3 ; Zhu, Fu-Lin 2 ; Liu, Zhen-Ting 2 ; Zhou, Xiao-Mao 1 ; Hu, Xiang-Ping 2 ;
作者机构： 1.Hunan Acad Agr Sci, Biotechnol Res Ctr, Changsha 410125, Hunan, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
3.Collaborat Innovat Ctr Field Weeds Control, Loudi 417000, Hunan, Peoples R China
期刊名称：ORGANIC LETTERS （ 影响因子：6.005； 五年影响因子：5.551 ）
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收录情况： SCI
摘要： A highly enantioselective palladium-catalyzed [3 + 2] cycloaddition of propargylic esters with, beta-ketoesters has been realized by employing a newly developed chiral ferrocene/benzimidazole-based P,N-ligand. This protocol features a good tolerance of functional groups in both propargylic esters and beta-ketoesters, thereby delivering a variety of highly functionalized chiral 2,3-dihydrofurans bearing an exocyclic double bond at the 3-position in good yields and with high enantioselectivities (up to 98% ee).
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