We report a general palladium-catalyzed β-arylation of Boc-piperidines, which yields a variety of valuable 3-arylpiperidines in a simple and direct manner. The β- vs. α-arylation selectivity was controlled by the ligand, with flexible biarylphosphines providing mainly the desired β-arylated products whereas more rigid biarylphosphines mainly furnished the more classical α-arylated products. The computed reaction mechanism (DFT), studied from the common α-palladated intermediate, indicated that the reductive elimination steps leading to the α- and β-arylated products are selectivity-determining. Moreover, the experimental trend obtained with different ligands was well reproduced by the calculations.
(S)-5-ethynyl-anabasine, derivatives thereof, and related compositions and methods of making and using
申请人:IOWA STATE UNIVERSITY RESEARCH FOUNDATION, INC.
公开号:US10667515B2
公开(公告)日:2020-06-02
(S)-5-ethynyl-anabasine and derivatives thereof; composition comprising same and a carrier; methods of treating an animal; method of protecting a plant from a pest; and methods of making compound and derivatives.
Application of Catalytic Dynamic Resolution of <i>N</i>-Boc-2-lithiopiperidine to the Asymmetric Synthesis of 2-Aryl and 2-Vinyl Piperidines
作者:Timothy K. Beng、Robert E. Gawley
DOI:10.1021/ol102682r
日期:2011.2.4
The highly enantioselective synthesis of 2-aryl- and 2-vinyl-piperidines has been accomplished through a catalytic dynamic resolution (CDR) of N-Boc-2-lithiopiperidine. The method has been applied to the synthesis of both enantiomers of the tobacco alkaloid anabasine.
(S)-5-ETHYNYL-ANABASINE, DERIVATIVES THEREOF, AND RELATED COMPOSITIONS AND METHODS OF MAKING AND USING
申请人:IOWA STATE UNIVERSITY RESEARCH FOUNDATION, INC.
公开号:US20180139961A1
公开(公告)日:2018-05-24
(S)-5-ethynyl-anabasine and derivatives thereof; composition comprising same and a carrier; methods of treating an animal; method of protecting a plant from a pest; and methods of making compound and derivatives.