The mechanism of asymmetric reduction catalyzed by a C2 symmetric bis-amino alcohol catalyst --In situ NMR study of the

By means of 1H, 13C, 11B NMR, polar transfer DEPT135, DEPT90 and 2D NMR experiments, IR, etc, the structure of the diaminodihydroxyl ligand and its derivatives used in the asymmetric reduction of prochiral ketones were detected. The catalysts derived from the ligand and borane formed in situ were also studied and the structure transformations in solution were monitored. The structure of the catalyst was proved to be a new type of dual-centered catalyst bis- oxazaborolidine.

作 者： ZHAO Jinkai HAN Xiuwen LIU Xiumei BAO Xinhe HANG Jianfeng JIANG Biao   作者單位： ZHAO Jinkai,HAN Xiuwen,LIU Xiumei,BAO Xinhe(State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China)

HANG Jianfeng,JIANG Biao(Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China) 

刊 名： 中國科學B輯（英文版）  EI SCI 英文刊名： SCIENCE IN CHINA(SERIES B)  年，卷(期)： 2000 43(1)  分類號： O6  關鍵詞： 2D gradient experiment   in situ NMR   diaminodihydroxylborane   bis-oxazaborolidine  

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