used as a catalyst for the synthesis of a series of 2H-indazolo[2,1-b]phthalazine-triones and Biginelli-like products. It was observed that only 10 mg of the catalyst was enough to catalyze these reactions under mild conditions, and the corresponding products were obtained in high to excellent yields. Moreover, the catalyst could be repeatedly used for at least five times without a noticeable decrease
在这项工作中,使用O-
磺酸聚(4-
乙烯基吡咯烷鎓)
氯化物([PVP-SO]首次有效地合成了一系列2 H-
吲唑并[2,1-b]邻苯二嗪三酮和类似Biginelli的产物。3 H] Cl)作为环保型聚合物负载型催化剂。首先,根据
氯磺酸的量和磺化时间对催化剂的制备工艺进行优化,以得到最大酸度的催化剂。获得的[PVP-SO 3 H] Cl的最大酸度为3.31 mmol g -1。然后,将优化的[PVP-SO 3 H] Cl用作合成一系列2 H的催化剂-
吲唑并[2,1-b]
酞嗪三
酮类和Biginelli样产品。观察到仅10mg的催化剂足以在温和的条件下催化这些反应,并且以高至优异的产率获得了相应的产物。此外,该催化剂可以重复使用至少五次而其催化活性没有明显降低。