作者:Mohammed H. Al-huniti、Salvatore D. Lepore
DOI:10.1002/adsc.201300233
日期:2013.10.11
A Ritter-like coupling reaction of cyclic alcohols and both aryl and alkyl nitriles to form amides catalyzed by copper (II) triflate is described. These reactions proceed in good yields under mild and often solvent-free conditions. With 2- and 3-substituted cycloalkanols, amide products are formed with near complete retention of configuration. This is likely due to fast nucleophilic capture of a non-planar
描述了环状醇与芳基和烷基腈两者的Ritter-like偶联反应,形成了由三氟甲磺酸铜(II)催化形成的酰胺。这些反应在温和且通常无溶剂的条件下以高收率进行。与2-和3-取代的环烷醇一起,形成酰胺产物,几乎完全保留了构型。这可能是由于通过环超共轭稳定的非平面碳正离子(超高聚物)的快速亲核捕获。该新颖的催化循环的关键方面是亚硫酰氯原位活化醇底物以形成亚氯硫酸盐。