Synthesis of fused 3-amino-1,2,4-triazoles via sequential addition of aryl hydrazines to isothiocyanates and I 2 -mediated cyclodesulfurization
作者:Shufeng Jiao、Zhen Wang、Qiongli Zhao、Wenquan Yu、Junbiao Chang
DOI:10.1016/j.tet.2018.05.009
日期:2018.6
A variety of fused 3-amino-1,2,4-triazole derivatives were synthesized via addition of aryl hydrazines to isothiocyanates followed by I2-mediated oxidative cyclodesulfurization. This transition-metal-free synthetic process provides facile access to 1,2,4-triazolo[4,3-a]pyridines and related heterocyclic frameworks bearing a 3-amino substituent from readily accessible substrates in an efficient and
通过将芳基肼加到异硫氰酸酯中,然后进行I 2介导的氧化环脱硫,合成了多种稠合的3-氨基-1,2,4-三唑衍生物。这种无过渡金属的合成方法可轻松,高效地从容易获得的底物中轻松获得1,2,4-三唑并[4,3- a ]吡啶和带有3-氨基取代基的相关杂环骨架。