熊东路.双芳烃桥连salen配体的合成及其钛配合物在硅腈对醛的不对称加成反应中的应用[J].分子催化,2011,(1):1-5 |
双芳烃桥连salen配体的合成及其钛配合物在硅腈对醛的不对称加成反应中的应用 |
The Synthesis of Biaryl-bridged Salen Ligands and Their Application in Ti-Catalyzed Asymmetric Addition of Trimethylsilyl Cyanide to Aldehydes |
投稿时间:2010-10-14 修订日期:2010-11-12 |
DOI: |
中文关键词: salen Ti 双芳烃桥链 醛 三甲基硅腈 |
英文关键词:Salen Ti, biaryl-bridged, Trimethylsilyl cyanide, Aldehydes |
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中文摘要: |
新型双芳烃桥连的salen钛配合物是一种高活性的催化三甲基硅腈对醛不对称加成反应的催化剂,底物与催化剂用量比率可达1000:1。由(R,R)-1,2-环已二胺和3,5-二叔丁基水杨醛合成的催化剂4在催化三甲基硅腈对醛不对称加成反应中达到87%的对映选择性。 |
英文摘要: |
The Biaryl-bridged Salen Ti complexes are catalytically active at substrate-to-catalyst ratios as high as 1000:1 in the reaction of asymmetric addition of trimethylsilyl cyanide to aldehydes, and the optimal catalyst 4 derived from (R,R)-1,2-diaminocyclohexane and 3,5-di-tert-butyl-2-hydroxybenzaldehyde produces trimethylsilyl ethers of cyanohydrins with up to 87% enantiomeric excess at ambient temperature. |
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