Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (8): 2458.doi: 10.7503/cjcu20210078

• Organic Chemistry • Previous Articles     Next Articles

Synthesis of Norephedrine in One Pot

LUO Lei1,2, MU Xiaoqing1,2(), WU Tao1,2, NIE Yao1, XU Yan1   

  1. 1.Key Laboratory of Industrial Biotechnology,Ministry of Education,Jiangnan University,Wuxi 214122,China
    2.Suqian Jiangnan University Institute of Industrial Technology,Suqian 223800,China
  • Received:2021-02-03 Online:2021-08-10 Published:2021-08-05
  • Contact: MU Xiaoqing E-mail:xqmu@jiangnan.edu.cn

Abstract:

In this study, a new biosynthetic pathway of norephedrine was constructed, through cascading the carboligation reaction catalyzed by acetohydroxyacid synthase Ⅰ(ASAHI) and reductive amination reaction ca-talysed by amine dehydrogenase(BbAmDH), the cheap substrate benzaldehyde, pyruvate and NH4Cl used as raw materials. Optimizing the reaction conditions of the two-step and one-pot method, the conversion rate of benzaldehyde was as high as 99% in the two-step and 83% in one-pot. Utilizing the strategy of feeding in one pot, the substrate and production inhibition effect of ASAHI was successfully relieved, and the benzaldehyde loading was increased to 100 mmol/L from 40 mmol/L in the batch reaction; the benzaldehyde conversion rate was increased to 90% from 83%, and the space-time conversion rate of benzaldehyde was increased by 2.7 times.

Key words: Norephedrine, One-pot, Biotransformation, Acetohydroxyacid synthase I, Amine dehydrogenase

CLC Number: 

TrendMD: