Facile One-Pot Synthesis of Di- and Tri-Substituted Furans From Acyl Isocyanates Using Trimethylsilyldiazomethane
作者:Toyohiko Aoyama、Yoshiyuki Hari、Tomoe Iguchi
DOI:10.1055/s-2004-822397
日期:——
The Diels-Alder reaction of 2-substituted 4-(trimethyl-silyloxy)oxazoles, which were prepared in situ from trimethylsilyldiazomethane and acyl isocyanates, with dimethyl acetylenedicarboxylate or ethyl propiolate gave furan-3,4-dicarboxylic or furan-3-carboxylic esters in good yields.
由三甲基甲硅烷基重氮甲烷和酰基异氰酸酯原位制备的 2-取代的 4-(三甲基-甲硅烷氧基)恶唑与乙炔二甲酸二甲酯或丙炔酸乙酯的 Diels-Alder 反应得到呋喃-3,4-二羧酸或呋喃-3-羧酸酯在良好的产量。