One-pot four-component reaction of aldehydes, dimedone, ethyl cyanoacetate or ethylacetoacetate and ammoniumacetate was studied in the presence of perchlorated Zr-MCM-41 (ClO4 −/Zr-MCM-41) nanoparticles for the synthesis of dihydropyridines. Zr-MCM-41 nanoparticles with various molar ratios of Si/Zr were synthesized by sol–gel method under mild conditions, and then ClO4 −/Zr-MCM-41 samples with different
One-pot three component reaction of various types of aldehydes, dimedone, ammonium
acetate and active methylene compounds was carried out in the presence of MCM-41 functionalized
with B-F bonds nanostructured catalyst for the synthesis of polyhydroquinolines. MCM-41 was
prepared by Sol-Gel method under mild conditions and B-F functionalized MCM-41 with various
loading amounts of boron/fluoride were prepared and characterized by XRD, SEM, FT-IR, TEM and
BET techniques. The results show that B-F functionalized MCM-41 with calcination temperature of
400ºC has the best catalytic activity. The catalyst is reusable many times with moderate decrease in activity.
FSM-16-SO3H nanoparticles as a novel heterogeneous catalyst: preparation, characterization, and catalytic application in the synthesis of polyhydroquinolines
Abstract FSM-16-SO3H nanoparticles were prepared using a sol-gel method at room temperature. The prepared FSM-16-SO3H was used to catalyze the synthesis of polyhydroquinolines through a one-pot, four-component reaction of aldehydes, dimedone, ethyl cyanoacetate, and ammonium acetate under reflux condition in EtOH as a green solvent. To investigate the textural properties of the prepared catalyst, various
摘要 FSM-16-SO3H 纳米粒子采用溶胶-凝胶法在室温下制备。制备的 FSM-16-SO3H 用于通过醛、二甲酮、氰基乙酸乙酯和乙酸铵在 EtOH 绿色溶剂中回流条件下的一锅四组分反应催化合成多氢喹啉。为了研究所制备催化剂的结构特性,应用了各种技术,如 X 射线衍射、傅里叶变换红外光谱、扫描电子显微镜和布鲁诺-埃米特-泰勒。高催化活性、易于操作和热稳定性是该催化剂的连续研究后可以表示的优越性能。此外,催化剂可以很容易地回收并有效地重复使用几个循环。