1,2,3-Thiadiazole as a Modifiable and Scalable Directing Group for <i>ortho</i>-C–H Functionalization
作者:Xiaoyan Jia、Donghui Xing、Jiayi Shen、Bo Li、Yue Zeng、Huanfeng Jiang、Liangbin Huang
DOI:10.1021/acs.orglett.3c04075
日期:2024.3.1
modifiable directing group for C–H amidation and alkynylation with dioxazolones, p-toluenesulfonyl azide, and bromoalkynes in high yield. The densely functionalized 1,2,3-thiadiazole products are modified into thioamide, multisubstituted furan, γ-thiapyrone, thiazole, and various alkynyl sulfides through simple and one-step reactions. The competition experiments reveal that the directing ability of 1,2,3-thiadiazole
在过去的几十年里,定向C-H键功能化在学术界和工业界具有巨大的应用前景。在 C-H 官能化中,非常需要开发一种新颖的、易于获得的、可扩展的、具有可修改能力的导向基团。在此,我们报道了 1,2,3-噻二唑作为可修饰的导向基团,用于与二恶唑酮、对甲苯磺酰叠氮和溴代炔进行 C-H 酰胺化和炔基化,产率高。通过简单的一步反应,将密集功能化的1,2,3-噻二唑产品改性为硫代酰胺、多取代呋喃、γ-噻吡酮、噻唑和各种炔基硫醚。竞争实验表明,1,2,3-噻二唑的定向能力略弱于吡啶和二齿酰胺,但强于广泛使用的羧酸盐。