novel and efficient cerium-catalyzed tandem oxidation and intermolecular ring cyclization of vicinal diols with hydrazones has been achieved for the regioselective synthesis of pyrazole derivatives. The corresponding 1,3-di- and 1,3,5-trisubstituted pyrazoles were obtained in moderate to excellent yields. The reaction has the advantages of mild conditions, easily available starting materials, broad substrate
已经实现了一种新型高效的
铈催化串联氧化和邻位二醇与腙的分子间环化,用于
吡唑衍
生物的区域选择性合成。相应的 1,3-二和 1,3,5-三取代
吡唑以中等到极好的产率获得。该反应条件温和、起始原料易得、底物适用范围广、官能团耐受性好。