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Switchable and Scalable Heteroarylation of Primary Amines with 2-Chlorobenzothiazoles under Transition-Metal-Free and Solvent-Free Conditions

Hua Cheng, Yan-Qiu Zhu, Peng-Fei Liu, Kai-Qiang Yang, Jin Yan, Wei Sang, Xiao-Sheng Tang, Rui Zhang* and Cheng Chen*

*Hubei University of Arts and Science, 296 Longzhong Road, Xiangyang 441053; Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, P. R. China, Email:,

H. Cheng, Y.-Q. Zhu, P.-F. Liu, K.-Q. Yang, J. Yan, W. Sang, X.-S. Tang, R. Zhang, C. Chen, J. Org. Chem., 2021, 86, 10288-10302.

DOI: 10.1021/acs.joc.1c01019

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A transition-metal-free and scalable C-N coupling protocol achieves the synthesis of 2-aminobenzothiazoles from 2-chlorobenzothiazoles and primary amines under solvent-free conditions. Moreover, introducing an appropriate amount of NaH completely switched the selectivity from mono- toward di-heteroarylation.

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Key Words

benzothiazoles, green chemistry

ID: J42-Y2021