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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 31, Number 9
BKCSDE 31(9)
September 20, 2010

Title	Synthesis, Characterization and Application of Poly(4-Methyl Vinylpyridinium Hydroxide)/SBA-15 Composite as a Highly Active Heterogeneous Basic Catalyst for the Knoevenagel Reaction
Author	Roozbeh Javad Kalbasi, Majid Kolahdoozan, Ahmadreza Massah, Keinaz Shahabian
Keywords	Knoevenagel condensation, Ethyl cyanoacetate, P4MVPH/SBA-15, Green method, H₂O
Abstract	In this paper poly (4-methyl vinylpyridinium hydroxide)/SBA-15 composite was prepared as a highly efficient heterogeneous basic catalyst by in situ polymerization method for the first time. It was characterized by XRD, FT-IR, BET, TGA, SEM and back titration using NaOH. This catalyst exhibited the excellent catalytic activities for the Knoevenagel condensation of various aldehydes with ethyl cyanoacetate. Over this catalyst, α,β-unsaturated carbonyl compounds were obtained in the reasonable yield at 95 ^oC in 10 - 30 min in H2O as a solvent with a 100% selectivity to the condensation products. Catalyst could be easily recycled after the reaction and it could be reused without the significant loss of activity/selectivity performance. No by-product formation, high yields, short reaction times, mild reaction conditions and operational simplicity with reusability of the catalyst were the salient features of the present synthetic protocol. Presence of H₂O as a solvent was also recognized as a “green method”.
Page	2618 - 2626
Full Text	PDF

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