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Access to 3-Amino-[1,2,4]-triazolo Pyridines and Related Heterocycles via Electrochemically Induced Desulfurative Cyclization. 2022
Yunfei Hu, and
Li Chen, and
Canlin Zou, and
Jiangtao He, and
Luanqi Feng, and
Jia-Qiang Wu, and
Wen-Hua Chen, and
Jinhui Hu
School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529020, P. R. China.
An efficient, one-pot approach has been established for synthesizing a wide range of 3-amino-[1,2,4]-triazolo pyridines and related heterocycles from the electrochemically induced desulfurative cyclization of 2-hydrazinopyridines with isothiocyanates. The protocol allows for the formation of C-N bonds under simple conditions without transition metals or external oxidants. The practicability of this strategy is demonstrated by its broad substrate scope, good functional group compatibility, and gram-scale synthesis. The late-stage modification of 3-amino-[1,2,4]-triazolo pyridines enables us to obtain several molecules with potent anticancer activity.
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