Direct Cyclization/Chlorination Strategy of Hydrazines for Synthesis of 4-chloropyrazoles by TCCA
Escrito por Qingfu Deng, Chenglong Ma, Liangzhen Hu y Yan Xiong
Publicada
Servidor
Preprints.org
DOI
10.20944/preprints202508.1346.v1
A new method for synthesis of various of 4-chloropyrazoles through the direct cyclization/chlorination of hydrazines by using 1,3,5-trichloroisocyanuric acid (TCCA) as both oxidant and chlorinating agent under mild conditions has been proposed. Based on the detailed optimization of the reaction conditions, the substrate generality has been investigated and the yields of the desired products is up to 92% .
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