Synlett 2021; 32(10): 1044-1048
DOI: 10.1055/a-1473-7369
letter

Diiiodine/Potassium Persulfate Mediated Synthesis of 1,2,3-Thiadiazoles from N-Tosylhydrazones and a Thiocyanate Salt as a Sulfur Source under Transition-Metal-Free Conditions

Yuhan Lu
b   The Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education and Xinjiang Uygur Autonomous Region, Urumqi Key Laboratory of Green Catalysis and Synthesis Technology, School of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, P. R. of China
,
Yadong Sun
a   College of Chemical and Material Engineering, Quzhou University, Quzhou 324000, P. R. of China
b   The Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education and Xinjiang Uygur Autonomous Region, Urumqi Key Laboratory of Green Catalysis and Synthesis Technology, School of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, P. R. of China
,
Ablimit Abdukader
b   The Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education and Xinjiang Uygur Autonomous Region, Urumqi Key Laboratory of Green Catalysis and Synthesis Technology, School of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, P. R. of China
,
Chenjiang Liu
b   The Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education and Xinjiang Uygur Autonomous Region, Urumqi Key Laboratory of Green Catalysis and Synthesis Technology, School of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, P. R. of China
› Author Affiliations
We are grateful for financial support from the Xinjiang Natural Science Foundation (2020D01C024), the National Natural Science Foundation of China (21662032, 21562039, and 22061040), and the startup funds of Quzhou University (BSYJ202108).


Abstract

A highly efficient method for the synthesis of 1,2,3-thiadiazoles has been developed by utilizing readily available tosylhydrazones and ammonium thiocyanate with ecofriendly EtOH as the solvent at room temperature. The reaction shows a wide scope of substrates and good functional-group tolerance. This protocol can be scaled up to a gram level and can be applied to coupling reactions with 4-(4-bromophenyl)-1,2,3-thiadiazole as the substrate.

Supporting Information



Publication History

Received: 05 February 2021

Accepted after revision: 03 April 2021

Accepted Manuscript online:
03 April 2021

Article published online:
23 April 2021

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