Chemoselective <i>N</i>-arylation of aminobenzamides <i>via</i> copper catalysed Chan–Evans–Lam reactions
作者:Shuai Liu、Weisai Zu、Jinli Zhang、Liang Xu
DOI:10.1039/c7ob02491f
日期:——
Chemoselective N-arylation of unprotected aminobenzamides was achieved via Cu-catalysed Chan–Evans–Lam cross-coupling with aryl boronic acids for the first time. Simple copper catalysts enable the selective arylation of amino groups in ortho/meta/para-aminobenzamides under open-flask conditions. The reactions were scalable and compatible with a wide range of functional groups.
DMSO–allyl bromide: a mild and efficient reagent for atom economic one-pot <i>N</i>-allylation and bromination of 2°-aryl amines, 2-aryl aminoamides, indoles and 7-aza indoles
A mixture DMSO–allyl bromide has been developed as a reagent for an atom economic one-pot N-allylation and aryl bromination under basic conditions. Utilizing this reagent, N-allylation–bromination of a number of 2°-aryl amines, aryl aminoamides, indoles, and 7-aza indoles has been achieved. The scope of the substrates and limitations, the synthetic utility of the products, and a plausible reaction
method for the construction of the quinazolinone skeleton from the reaction of 9-(phenylethynyl)-9H-fluoren-9-ols with substituted 2-aminobenzamides catalyzed by borontrifluoride is achieved. The scope of the reaction with several 9-(phenylethynyl)-9H-fluoren-9-ols and substituted 2-aminobenzamides have been demonstrated. Repeating the reaction in the presence of NBS afforded 2-(bromo(9H-fluoren-9
实现了在三氟化硼催化下,9-(苯乙炔基)-9 H-芴-9-醇与取代的2-氨基苯甲酰胺反应构建喹唑啉酮骨架的有效方法。已经证明了与几种 9-(苯基乙炔基)-9 H -fluoren-9-ols 和取代的 2-氨基苯甲酰胺的反应范围。在 NBS 存在下重复该反应,得到 2-(溴(9 H-芴-9-亚基)甲基)-2-苯基-2,3-二氢喹唑啉 4(1 H )酮。通过单晶XRD方法建立了代表性化合物的结构。通过以下途径形成标题化合物的合理机制提出了丙二烯碳正离子中间体。通过使用 Suzuki 偶联和炔丙基化,然后进行“点击”反应,证明了由此形成的产品的合成效用。
N-Arylation Reaction of 2-Amino-N-phenylbenzamide with Phenyl Boronic Acid via Chan–Evans–Lam (CEL) Type Reaction Using Cu@Phen@MGO Catalyst
of magnetic graphene oxide (MGO) with phenanthroline type ligand. The catalyst was characterized by several characterization methods and used as an effective magnetic heterogeneous nanocatalyst for the N-arylation of 2-amino-N-phenylbenzamide. Cu@Phen@MGO catalyst showed very good efficiency in base-free Chan–Evans–Lam coupling of arylboronic acid with 2-amino-N-phenylbenzamide at room temperature.