Enantioselective Borohydride Reduction of<i>N</i>-Diphenylphosphinyl Imines Using Optically Active Cobalt(II) Complex Catalysts
作者:Kiyoaki D. Sugi、Takushi Nagata、Tohru Yamada、Teruaki Mukaiyama
DOI:10.1246/cl.1997.493
日期:1997.6
The enantioselective borohydride reduction using optically active cobalt(II) complex catalysts was successfully applied to various aryl N-diphenylphosphinyl imines, and the corresponding reduced products were obtained in good yields with high enantiomeric excesses (up to 99% ee). The optically active primary amines were obtained by the successive hydrolysis under mild conditions.
Asymmetric Hydrogenation of Cyclic N-Sulfonylimines with Phosphine-Free Chiral Cationic Ru-MsDPEN Catalysts
作者:Fei Chen、Zhiwei Li、Yanmei He、Qinghua Fan
DOI:10.1002/cjoc.201090260
日期:2010.9
Phosphine‐free chiralcationic Ru/diamine complexes are effective catalysts for the asymmetrichydrogenation of a range of cyclic N‐sulfonylimines, affording chiral sultam derivatives with good to excellent enantioselectivity (up to 94% ee).
Asymmetric hydrogenation of N-tosylimines catalyzed by BINAP-ruthenium(II) complexes
作者:AndréB. Charette、André Giroux
DOI:10.1016/s0040-4039(96)01471-2
日期:1996.9
The asymmetric hydrogenation of N-tosylimines was accomplished with a catalytic amount of Ru[(R)-2,2′-bis(diphenylphosphino)-1,1′-binaphthyl](O2CCH3)2 to afford the corresponding amines in high enantiomeric excesses.
A chiral 3.3',5,5'-tetrabromosubstituted (salen)manganese(III) complex was found to be an efficient catalyst for asymmetric Cn amination (up to 89% ee). In the reaction of cycloalkenes, allylic amination occurred in preference to aziridination, (C) 2001 Elsevier Science Ltd. All rights reserved.