Li X, Yuan X, Wu Y, Guo H, Liu Q, Huang S. Synthesis of 3,4,5-Trisubstituted 1,2,4-Triazoles via I
2-Catalyzed Cycloaddition of Amidines with Hydrazones.
J Org Chem 2024;
89:5277-5286. [PMID:
38587487 DOI:
10.1021/acs.joc.3c02637]
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Abstract
A general and practical method for the construction of various 3,4,5-trisubstituted 1,2,4-triazoles via I2-catalyzed cycloaddition of N-functionalized amidines with hydrazones is reported. This strategy features cheap and readily available catalyst and starting materials, broader substrate scope, and moderate-to-good yields. The mechanism study shows that the existence of hydrogen on the nitrogen of hydrazones is crucial for this transformation.
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