Volume 48, Issue 5 e70022
Research Article

Kinetics Research and Process Development for the Intensification of the Fully Continuous Flow Synthesis of 3-Amino-1-Adamantanol

Jiadi Zhou

Corresponding Author

Jiadi Zhou

Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou No.18 Chaowang Road, Hangzhou, 310014 P. R. China

E-mail: [email protected]; [email protected]

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Weilong Zhang

Weilong Zhang

Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou No.18 Chaowang Road, Hangzhou, 310014 P. R. China

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Shangkun Bai

Shangkun Bai

Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou No.18 Chaowang Road, Hangzhou, 310014 P. R. China

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Yinghui Shao

Yinghui Shao

Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou No.18 Chaowang Road, Hangzhou, 310014 P. R. China

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Yuanyuan Tang

Yuanyuan Tang

Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou No.18 Chaowang Road, Hangzhou, 310014 P. R. China

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Mengqian Jing

Mengqian Jing

Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou No.18 Chaowang Road, Hangzhou, 310014 P. R. China

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Zhiqun Yu

Corresponding Author

Zhiqun Yu

Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou No.18 Chaowang Road, Hangzhou, 310014 P. R. China

E-mail: [email protected]; [email protected]

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First published: 14 April 2025

Abstract

3-Amino-1-adamantanol (3AA) is an important intermediate of vildagliptin. In this work, a fully continuous flow synthesis of 3-amino-1-adamantanol has been proposed. Selecting amantadine sulfate (AS) as the starting material, the effects of process parameters were systematically investigated, such as the molar ratio of reactants, the amount of sulfuric acid and reaction temperature. The kinetics of nitration reaction were carried out in both batch and continuous flow processes to explain the relationship between the amount of sulfuric acid and the reaction rate constant. Based on the apparent reaction rate constants and thermodynamic parameters, a fully continuous flow synthesis of 3AA combining nitration, hydrolysis and neutralization reaction has been realized. Compared with the batch method, the reaction time was shortened from 8 h to 36 min, the side reactions were significantly inhibited, and the yield increased from 87.8 % to 95.2 % by continuous flow strategy.

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