Synthesis of new pyrazole-1,2,3-triazole dyads |
| |
Authors: | Joana PA Ferreira Vera LM Silva José Elguero Artur MS Silva |
| |
Institution: | 1. Department of Chemistry & QOPNA, University of Aveiro, 3810-193 Aveiro, Portugal;2. Instituto de Química Médica, C/Juan de la Cierva 3, 28006 Madrid, Spain |
| |
Abstract: | An efficient two step synthetic methodology of new 5(4)-aryl-4(5)-3(5)-(2-hydroxyphenyl)-1H-pyrazol-5(3)-yl]-1H-1,2,3-triazole dyads was established. The reaction of (E)-2-styryl-4H-chromen-4-ones, used as building blocks, with sodium azide, gave 4(5)-aryl-5(4)-(chromon-2-yl)-1H-1,2,3-triazoles bearing either electron-donating or electron-withdrawing substituents in their styryl moiety which upon reaction with hydrazine hydrate afforded the expected pyrazoles in moderate to very good yields. |
| |
Keywords: | Pyrazoles 1 2 3-Triazoles (E)-2-Styryl-4H-chromen-4-ones Hydrazine hydrate |
本文献已被 ScienceDirect 等数据库收录! |
|