Synthesis and Applications of Chiral Bicyclic Bisborane Catalysts
SYNTHESIS-STUTTGART(2022)
摘要
The development of chiral borane Lewis acid catalysts opened the door for transition-metal-free catalyzed asymmetric organic reactions. Herein, we have summarized our work on the preparation of two classes of novel chiral bicyclic bisborane Lewis acid catalysts derived from C-2-symmetric [3.3.0] dienes and [4.4] dienes, respectively. These catalysts not only form frustrated Lewis pairs with Lewis bases to catalyze asymmetric hydrogenation reactions but also activate Lewis basic functional groups in traditional Lewis acid catalyzed asymmetric reactions.
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关键词
chiral borane, Lewis acid, frustrated Lewis pair, asymmetric catalysis, C-2-symmetric, hydrogenation
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