作者:Anil M. Deshpande、Arvind A. Natu、Narshinha P. Argade
DOI:10.1055/s-2002-31967
日期:——
A facile route to furan-3,4-dicarboxylic acid is described. Dimethylmaleic anhydride (1) on NBS-bromination followed by aqueous KOH treatment gave bis(hydroxymethyl)maleic anhydride (3), which on intramolecular Mitsunobu ring closure followed by esterification and DDQ-oxidation furnished the desired esters of furan-3,4-dicarboxylic acid 7a/b.
描述了制备呋喃-3,4-二甲酸的简便途径。二甲基马来酸酐 (1) 经过 NBS 溴化,然后用 KOH 水溶液处理,得到双(羟甲基)马来酸酐 (3),其在分子内 Mitsunobu 闭环上,然后进行酯化和 DDQ 氧化,得到所需的呋喃-3,4-二羧酸酯酸7a/b。