Issue 91, 2021

Synthesis of multi-substituted 1,2,4-triazoles utilising the ambiphilic reactivity of hydrazones

Abstract

The synthesis of N-alkyl-1H-1,2,4-triazoles from N,N-dialkylhydrazones and nitriles via formal [3+2] cycloaddition including the C-chlorination/nucleophilic addition/cyclisation/dealkylation sequence was developed. This sequential reaction utilising the in situ generation of hydrazonoyl chloride based on the ambiphilic reactivity of hydrazones afforded a variety of multi-substituted N-alkyl-triazoles in high yields. The synthetic utility of multi-substituted triazoles was also demonstrated by further transformations.

Graphical abstract: Synthesis of multi-substituted 1,2,4-triazoles utilising the ambiphilic reactivity of hydrazones

Supplementary files

Article information

Article type
Communication
Submitted
22 Sep 2021
Accepted
27 Oct 2021
First published
03 Nov 2021

Chem. Commun., 2021,57, 12187-12190

Synthesis of multi-substituted 1,2,4-triazoles utilising the ambiphilic reactivity of hydrazones

H. Matsuzaki, N. Takeda, M. Yasui, M. Okazaki, S. Suzuki and M. Ueda, Chem. Commun., 2021, 57, 12187 DOI: 10.1039/D1CC05326D

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