An efficient synthesis of 4,5-disubstituted-2<i>H</i>-1,2,3-triazoles from nitroallylic derivatives <i>via</i> a cycloaddition–denitration process
作者:Raju Jannapu Reddy、Md. Waheed、Thatikonda Karthik、Angothu Shankar
DOI:10.1039/c7nj03292g
日期:——
A metal-free convenient synthesis of 4,5-disubstituted N-unsubstituted 1,2,3-triazoles via a cycloaddition–denitration process has been described. A variety of readily available nitroallylic alcohols were reacted smoothly with sodium azide in the presence of p-toluenesulfonic acid (p-TsOH) to form synthetically viable triazolylacetates in good to high yields. Additionally, the nitroallylic acetates
已经描述了通过环加成-脱氮过程无金属方便地合成4,5-二取代的N-未取代的1,2,3-三唑。在对甲苯磺酸(p(-TsOH)形成合成可行的三唑基乙酸酯,产率高至高。另外,将硝基烯丙基乙酸酯和砜分别以中等至良好的产率转化为结构上可改性的三唑基叠氮化物和砜衍生的三唑。本方案操作简单,可耐受多种官能团,并且在优化反应条件下进行克级反应时也是可靠的。通过连续的一锅Morita-Baylis-Hillman反应和环加成反应,已经实现了一种简单直接的克级反应,可直接由β-硝基苯乙烯直接合成三唑。