| The mechanism of asymmetric reduction catalyzed by a C_2 symmetric bis-amino alcohol catalyst——In situ NMR study of the structure of new type of dual-centered catalyst |
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| 引用本文： | 赵金铠,韩秀文,刘秀梅,包信和,杭剑峰,姜标.The mechanism of asymmetric reduction catalyzed by a C_2 symmetric bis-amino alcohol catalyst——In situ NMR study of the structure of new type of dual-centered catalyst[J].中国科学B辑(英文版),2000,43(1). |
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| 作者姓名： | 赵金铠 韩秀文 刘秀梅 包信和 杭剑峰 姜标 |
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| 作者单位： | 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)
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| 摘 要： | 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 bo-rane 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.
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The mechanism of asymmetric reduction catalyzed by a C2 symmetric bis-amino alcohol catalyst --In situ NMR study of the structure of new type of dual-centered catalyst |
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| ZHAO Jinkai,HAN Xiuwen,LIU Xiumei,BAO Xinhe,HANG Jianfeng,JIANG Biao.The mechanism of asymmetric reduction catalyzed by a C2 symmetric bis-amino alcohol catalyst --In situ NMR study of the structure of new type of dual-centered catalyst[J].Science in China(Chemistry),2000,43(1). |
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| Authors: | ZHAO Jinkai HAN Xiuwen LIU Xiumei BAO Xinhe HANG Jianfeng JIANG Biao |
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| Abstract: | 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. |
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| Keywords: | 2D gradient experiment in situ NMR diaminodihydroxylborane bis-oxazaborolidine |
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