Practical access to spiroacetal enol ethers via nucleophilic dearomatization of 2-furylmethylenepalladium halides generated by Pd-catalyzed coupling of furfural tosylhydrazones with aryl halides
作者:Biaolin Yin、Xiaoyu Zhang、Jianchao Liu、Xuehui Li、Huanfeng Jiang
DOI:10.1039/c4cc01725k
日期:——
Pd-catalyzed cross-coupling of furfural tosylhydrazones with aryl halides produces 2-furylmethylenepalladium halides, which can undergo intramolecular nucleophilic dearomatization to provide spiroacetal enol ethers. This is the first report on the formation of 2-furylmethylenepalladium halides from stable furfural hydrazones instead of from 2-furylmethyl halides, which are not readily accessible or are unstable.
糠醛对甲苯磺酰肼与芳基卤化物的Pd催化交叉偶联反应生成2-呋喃亚甲基钯卤化物,后者可通过分子内亲核脱芳作用生成螺环乙醛烯醇醚。这是首次报道从稳定的糠醛肼而不是从不易获得或不稳定的2-呋喃亚甲基卤化物生成2-呋喃亚甲基钯卤化物。