Chinese Journal of Catalysis ›› 2023, Vol. 44: 171-178.DOI: 10.1016/S1872-2067(22)64174-3

• Articles • Previous Articles    

Biocatalytic aminohydroxylation of styrenes for efficient synthesis of enantiopure β-amino alcohols

Ruiwen Hua,1, Anjie Gongb,1, Langxing Liaob,1, Yan-Xin Zhengb,1, Xin Liub, Peng Wub, Fushuai Lib, Huili Yua, Jing Zhaoa, Long-Wu Yeb,*(), Binju Wangb,*(), Aitao Lia,*()   

  1. aState Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Key Laboratory of Industrial Biotechnology, School of life science, Hubei University, Wuhan 430062, Hubei, China
    bState Key Laboratory of Physical Chemistry of Solid Sur-faces and Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 360015, Fujian, China
  • Received:2022-07-23 Accepted:2022-09-21 Online:2023-01-18 Published:2022-12-08
  • Contact: Long-Wu Ye, Binju Wang, Aitao Li
  • About author:1 Contributed equally to this work.
  • Supported by:
    National Key Research and Development Program of China(2019YFA0906400);Innovation Base for Introducing Talents of Discipline of Hubei Province(2019BJH021);Research Program of State Key Laboratory of Biocatalysis and Enzyme Engineering

Abstract:

A general biocatalytic process of intermolecular aminohydroxylation of styrenes with aniline has been achieved for efficient one-pot preparation of enantiopure β-amino alcohols. The reaction involves first asymmetric epoxidation of alkene substrates by a heme-dependent monooxygenase (P450) or the FAD-dependent styrene monooxygenase, followed by the aminolysis of nascent epoxide intermediates with aniline in water solution. Hybrid cluster-continuum (HCC) model calculations reveal the mechanism of the aminolysis of epoxide with aniline as well as the critical role of the water in mediating such a reaction. In addition, the combined experiments with simulations demonstrate that the chirality of amino alcohol is determined by the absolute configuration of the epoxide formed in the enzymatic reaction. In conclusion, the developed biocatalytic process provides an efficient, environmentally friendly approach for production of high value-added enantiopure β-amino alcohols, starting from cheap and readily available alkenes.

Key words: Aminohydroxylation, β-amino alcohols, Alkene monooxygenase, Aminolysis of epoxide, Chemoenzymatic reaction