Ytterbium-Catalyzed Intramolecular [3 + 2] Cycloaddition based on Furan Dearomatization to Construct Fused Triazoles
作者:Xiaoming Xu、Ying Zhong、Qingzhao Xing、Ziwei Gao、Jing Gou、Binxun Yu
DOI:10.1021/acs.orglett.0c01780
日期:2020.7.2
development of expeditious methods to synthesize these skeletons remains a challenging task. In this work, the catalytic cyclization of biomass-derived 2-furylcarbinols with an azide to form fused triazoles is described. This approach takes advantage of a single catalyst Yb(OTf)3 and operates via a furfuryl-cation-induced intramolecular [3 + 2] cycloaddition/furan ring-opening cascade.
含1,2,3-三唑的多环结构广泛存在于广泛的合成生物活性分子中,开发合成这些骨架的快速方法仍然是一项艰巨的任务。在这项工作中,描述了由生物质衍生的2-呋喃基甲醇与叠氮化物的催化环化反应,以形成稠合的三唑。该方法利用单一催化剂Yb(OTf)3的优势,并通过糠基阳离子诱导的分子内[3 + 2]环加成/呋喃开环级联反应进行操作。