Facile Knoevenagel condensation Using Sulfonic Acid Functionalized Nanoporous silica (SBA-Pr-SO3H)
الموضوعات : International Journal of Bio-Inorganic Hybrid Nanomaterials
Gh. Mohammadi Ziarani
1
(Department of Chemistry, Alzahra University, P. O. Box 19938939973, Tehran, Iran)
F. Aleali
2
(Department of Chemistry, Alzahra University, P.O.Box 19938939973, Tehran, Iran)
N. Lashgari
3
(School of Chemistry, College of Science, University of Tehran, Tehran, Iran)
A. Badiei
4
(School of Chemistry, College of Science, University of Tehran, Tehran, Iran)
الکلمات المفتاحية:
ملخص المقالة :
Knoevenagel condensation between barbituric acid and aldehyde was investigated in the presence of sulfonic acid functionalized nanoporous silica (SBA-Pr-SO3H) and resulted in the formation of arylidene and bis-arylidene barbiturates. Excellent yields and short reaction times are related to the high efficiency of SBA-Pr-SO3H that the reactions take place easily in its nano-pores. SBA-Pr-SO3H as an efficient heterogeneous nanoporous solid acid catalyst which was prepared by silica functionalization with (3-mercaptopropyl) trimethoxysilane followed by oxidation with H2O2, can be easily removed from the reaction mixture by simple filtration, and also recovered and reused without noticeable loss of reactivity.
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