Methyl 2-Furoate: An Alternative Reagent to Furan for Palladium-Catalysed Direct Arylation
作者:Hai Yan Fu、Henri Doucet
DOI:10.1002/ejoc.201101102
日期:2011.12
The palladium-catalysed direct arylation of methyl 2-furoate with aryl bromides was studied. The use of KOAc as the base, dimethylacetamide (DMAc) as the solvent and Pd(OAc)2 as the catalyst was found to give 5-arylfurans regioselectively and without decarboxylation. These methyl 5-aryl-2-furoates gave 2,5-diarylfurans by decarboxylative coupling by using Pd(OAc)2 as the catalyst. Methyl 2-furoate
研究了钯催化的 2-糠酸甲酯与芳基溴化物的直接芳基化反应。发现使用 KOAc 作为碱、二甲基乙酰胺 (DMAc) 作为溶剂和 Pd(OAc) 2 作为催化剂可以区域选择性地得到 5-芳基呋喃并且没有脱羧。这些5-芳基-2-糠酸甲酯通过使用Pd(OAc) 2 作为催化剂的脱羧偶联得到2,5-二芳基呋喃。因此,2-糠酸甲酯代表了一种方便的替代呋喃的底物,用于合成单或多芳基化呋喃。