Novel stereoselective construction of a quaternary carbon: application to synthesis of the cyclopentenedione moiety of madindolines
摘要:
Enantioselective synthesis of the cyclopentenedione moiety of madindolines was achieved. Stereoselective construction of a quaternary carbon was realized by alkylation of an enolate possessing chiral auxiliary. Cyclopentenedione was derived from a triketone precursor by intramolecular condensation. (C) 2000 Elsevier Science Ltd. All rights reserved.
Novel stereoselective construction of a quaternary carbon: application to synthesis of the cyclopentenedione moiety of madindolines
摘要:
Enantioselective synthesis of the cyclopentenedione moiety of madindolines was achieved. Stereoselective construction of a quaternary carbon was realized by alkylation of an enolate possessing chiral auxiliary. Cyclopentenedione was derived from a triketone precursor by intramolecular condensation. (C) 2000 Elsevier Science Ltd. All rights reserved.
A highly stereoselective catalytic alkylation sequence for the synthesis of highly functionalized and versatile five-membered-ring compounds bearing all-carbon quaternary stereocenters was developed. Enantioselective desymmetrization of achiral cyclopentene-1,3-diones was thus executed by chiral Cu-phosphoramidite catalysts. A variety of complicated cyclopentane derivatives can be synthesized with
Ag(I)-Catalyzed Kinetic Resolution of Cyclopentene-1,3-diones
作者:Hua-Chao Liu、Liang Wei、Rong Huang、Hai-Yan Tao、Hengjiang Cong、Chun-Jiang Wang
DOI:10.1021/acs.orglett.8b01254
日期:2018.6.15
Ag(I)-catalyzed asymmetric 1,3-dipolarcycloaddition of azomethineylides. This methodology shows good functional-group tolerance, delivering an array of synthetically valuable cyclopentene-1,3-diones with excellent stereoselectivity and generally high resolution efficiency (s = 48–226) accompanied by the biologically important fused pyrrolidinederivatives. Notably, this strategy allows facile access to the key