Nickel-Catalyzed Reductive Addition of Aryl/Benzyl Halides and Pseudohalides to Carbodiimides for the Synthesis of Amides
作者:Farhad Panahi、Fereshteh Jamedi、Nasser Iranpoor
DOI:10.1002/ejoc.201501349
日期:2016.2
A Nickel-catalyzed reductive process is described for the direct amidation of benzyl and aryl halides using carbodiimides as the amidating agent. Moreover, aryl and benzyl C–O electrophiles such as triflate, acetate, tosylate, trityl ether, and pivalate were converted into amides using this method. The in-situ-generated Ni0 acts as a catalyst for the reaction at room temperature for benzylic substrates
描述了使用碳二亚胺作为酰胺化剂直接酰胺化苄基和芳基卤化物的镍催化还原方法。此外,芳基和苄基 C-O 亲电试剂,如三氟甲磺酸酯、乙酸酯、甲苯磺酸酯、三苯甲基醚和新戊酸酯,使用该方法转化为酰胺。原位生成的 NiO 充当室温下苄基底物和 70°C 芳基亲电试剂反应的催化剂。这种新的镍催化还原偶联方案为使用碳二亚胺合成各种酰胺提供了一种通用且操作简单的方法。带有大取代基的酰胺可以通过这种策略以高产率合成,这证明了其在酰胺合成中的有效性。