Synthesis 2022; 54(06): 1527-1536
DOI: 10.1055/a-1701-7679
short review

Synthesis and Applications of Chiral Bicyclic Bisborane Catalysts

Zhao-Ying Yang
,
Ming Zhang
,
We are grateful for financial support from the National Natural Science Foundation of China (Nos. 21871147 and 91956106), the Natural Science Foundation of Tianjin (Nos. 20JCZDJC00720 and 20JCJQJC00030), the NCC Fund (No. NCC2020PY10), and the Fundamental Research Funds for the Central Universities (No. 2122018165). X.-C.W. thanks the Tencent Foundation for support via the Xplorer Prize.


Abstract

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.

1 Introduction

2 Synthesis of C 2-Symmetric Fused Bicyclic Bisborane Catalysts and Their Use in Imine Hydrogenation

3 Synthesis of Spiro Bicyclic Bisborane Catalysts and Their Use in ­N-Heteroarene Reduction

4 Other Types of Asymmetric Reactions Promoted by Chiral ­Bicyclic Bisborane Catalysts

5 Conclusion



Publication History

Received: 05 November 2021

Accepted after revision: 19 November 2021

Accepted Manuscript online:
19 November 2021

Article published online:
20 January 2022

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