A Cu(OAc)2-mediated C-Hamidation and amination of arenes and heteroarenes has been developed using a readily removable directing group. A wide range of sulfonamides, amides, and anilines function as amine donors in this reaction. Heterocycles present in both reactants are tolerated, making this a broadly applicable method for the synthesis of a family of inhibitors including 2-benzamidobenzoic acids
A one-pot protocol has been developed for the synthesis of quinazolinones from amide-oxazolines with TsCl via a cyclic 1,3-azaoxonium intermediate and 6π electron cyclization in the presence of a Lewis acid and base. The process is operationally simple and has a broad substrate scope. This method provides a unique strategy for the construction of quinazolinones.
An efficient Cu-catalyzed C–H alkenylation with acyclic and cyclic vinyl boronates was realized for the first time under mild conditions. The scope of the vinyl borons and the compatibility with functional groups including heterocycles are superior than Pd-catalyzed C–H coupling with vinyl borons, providing a reliable access to multisubstituted alkenes and dienes. Subsequent hydrogenation of the product
Copper-Mediated Tandem C(<i>sp</i><sup>2</sup>)-H Sulfenylation and Annulation of Arenes with 2-Mercaptoimidazoles: Regio- and Site-selective Access to Polycyclic Fused Imidazo[2,1-<i>b</i>][1,3]thiazinones
by C(sp2)–H thiolation of benzamide with 2‐mercaptoimidazole followed by intramolecular nucleophilicsubstitution of the amide carbonyl group. A notable feature of this reaction is that it can afford rather complex products in a single synthesis step from easily accessible starting materials using amide‐oxazoline as a removable bidentate directing group. A variety of benzamides and 2‐mercaptoimidazoles
已经开发出有效的铜介导的串联C(sp 2)–H磺酰基化和芳烃与2-巯基咪唑环化的方法,以提供多环稠合的咪唑并[2,1– b ] [1,3]噻嗪酮。串联反应可能是由苯甲酰胺与2-巯基咪唑的C(sp 2)–H硫代化,然后是酰胺羰基的分子内亲核取代引起的。该反应的显着特征是,它可以使用酰胺-恶唑啉作为可移动的双齿导向基团,从易于获得的起始原料在单个合成步骤中获得相当复杂的产物。带有不同取代基的各种苯甲酰胺和2-巯基咪唑均适用于这种转化。