Palladium-Catalysed Direct Heteroarylation of Bromobenzylacetamide Derivatives: A Simple Access to Heteroarylated Benzylamine Derivatives
作者:Douniazad Abed、Henri Doucet、Nouria Laidaoui、Abdellah Miloudi
DOI:10.1055/s-0029-1218814
日期:2010.8
The palladium-catalysed direct arylation of bromobenzylacetamide derivatives using a wide variety of heteroaromatics gives a very simple access to heteroarylated benzylacetamides. 2-, 3- and 4-Bromobenzylacetamides present a very similar reactivity. In the presence of 2-subtituted furans, thiophenes, pyrroles, thiazoles, or imidazoles a regioselective 5-arylation was observed. The reaction of benzoxazole
使用各种各样的杂芳族化合物,钯催化的溴苄基乙酰胺衍生物的直接芳基化使得杂芳基化的苄基乙酰胺非常容易获得。2-,3-和4-溴苄基乙酰胺具有非常相似的反应性。在存在2-取代的呋喃,噻吩,吡咯,噻唑或咪唑的情况下,观察到区域选择性的5-芳基化。苯并恶唑反应得到2-芳基化的化合物。而3,5-二甲基异恶唑得到4-芳基化产物。在大多数情况下,使用PdCl(C 3 H 5)(dppb)作为催化剂,使用KOAc作为碱,使用DMAC作为溶剂的系统可获得较高的偶联产物收率。 钯-交叉偶联反应-芳基化-呋喃-噻吩-吡咯-噻唑-咪唑-苯并恶唑