| 标题 |
Asymmetric Cyanosilylation of Ketones Catalyzed by Monometallic Bifunctional Salen N-oxide Catalyst
单金属双官能Salen N-氧化物催化剂催化酮的不对称氰基硅烷化反应
相关领域
化学
双功能
催化作用
双功能催化剂
路易斯酸
吡咯烷
二胺
对映选择合成
对映体
金属salen络合物
有机化学
氧化物
对映体过量
药物化学
高分子化学
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LV Cheng-wei1, 2, CHENG Qi-gan1, WANG Shou-feng1, SUN Wei1* (1 State Key Laboratory for Oxo Synthesis and Seletive Oxidation, Lanzhou Institute of Chemical Physics, Lanzhou 73000, China 2 Chinese Academy of Sciences, Beijing, 100039, China) Abstract: In order to ameliorate the asymmetric inductivity and catalytic activity of the salen ligands with pyrrolidine diamine collar, Lewis acid and Lewis base group have been introduced at different positions of the salen unit. These new bifunctional N-oxide salen-Ti catalysts were successfully synthesized and applied to the catalytic asymmetric cyanosilylation of ketones in mild conditions. The products were obtained generally with moderate enantiomeric excesses and excellent yields. Key words:Chiral N-oxide salen-Ti; Bifunctional catalyst; Ketones; Asymmetric cyanosilylation E-mail: wsun@licp.cas.cn Journal of Molecular Catalysis, Vol. 25, Issue 4, 2011, 295~300 |
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