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化学进展  2015 

不对称三烯胺催化的发展

DOI: 10.7536/PC140836, PP. 137-145

Keywords: 手性胺催化,HOMO活化,三烯胺催化,区域和立体选择性

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Abstract:

手性胺可以与多不饱和羰基化合物原位生成三烯胺中间体,其给电子效应根据插烯规则可通过共轭不饱和体系传递,进而提高三烯胺体系的HOMO能量,并能够在远端β,ε-或δ,ε-位与多种缺电子烯烃发生Diels-Alder环加成反应。采用这种合成策略,可以制备许多结构多样和复杂的环状手性化合物。这种策略除了能够高效地在羰基化合物远端直接实现官能团化,更重要的是ε-反应位点即使距离催化剂手性中心达七个键之远,仍能获得优秀的立体选择性控制,这在不对称合成中具有重要的研究价值。本文将总结近年来不对称三烯胺催化机制的发现及发展,重点介绍2,4-二烯醛、多种二烯酮、含羰基芳香化合物经由三烯胺、交叉共轭三烯胺或形式三烯胺进行的不对称反应,并对手性胺催化的进一步应用进行展望。

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