高等学校化学研究 ›› 2019, Vol. 35 ›› Issue (1): 33-40.doi: 10.1007/s40242-018-8248-1
YANG Xiufang1,2,3, WANG Xiaogang1, WANG Tingting1, WANG Weitao1,2, ZHANG Jin1,2, MA Yangmin1,2,3
YANG Xiufang1,2,3, WANG Xiaogang1, WANG Tingting1, WANG Weitao1,2, ZHANG Jin1,2, MA Yangmin1,2,3
摘要: A simple, efficient and green procedure for the synthesis of spiro-oxindole dihyfroquinazolinones was developed by multi-component condensation of isatoic anhydride, aniline and isatin in the presence of a novel solid acid catalyst under ultrasound irradiation. The present environmentally benign protocol offers several advantages, such as shorter reaction time, a wide range of functional group tolerance, the use of an inexpensive heterogeneous catalyst, and a high yield of products via a simple experimental and work-up procedure. The mesoporous solid acid catalyst was directly prepared from phytic acid by microwave-sulfonation method without template. The phytic acid based solid acid was fully characterized by means of Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). The catalyst can be recovered and reused for at least five runs without significant impact on the product yields.