facile knoevenagel condensation using sulfonic acid functionalized nanoporous silica (sba-pr-so3h)
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abstract
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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Journal title:
international journal of bio-inorganic hybrid nanomaterialsPublisher: islamic azad university - varamin branch
ISSN 2251-8533
volume 4
issue 2 2015
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