期刊
CATALYSIS COMMUNICATIONS
卷 9, 期 5, 页码 577-583出版社
ELSEVIER
DOI: 10.1016/j.catcom.2007.02.016
关键词
1,1-diacetates; aldehydes; Al-MCM-41; hydrophobic; PW/MCM-41
Mesoporous Si-MCM-41 and Al-MCM-41 molecular sieves in four Si/Al ratios 25, 50, 75 and 100 were synthesized under hydrothermal condition. 10 wt.%, 15 wt.'% and 20 wt.% H3PW12O40 (PW) was supported on Si-MCM-41 and characterized using powder X-ray diffraction (XRD), FT-IR, BET and TEM techniques. Geminal diacetates were synthesized from a variety of aromatic aldellydes including those carrying electron donating or withdrawing substituents in good yields. The relatively non-toxic nature of the catalyst, its ease of handling and its easy availability makes the procedure attractive for eco-friendly organic synthesis. 20 wt.% PW/MCM-41 was found to be more active than other catalyst used and have similar activity as that of unsupported heteropoly acids (HPAs). (c) 2007 Published by Elsevier B.V.
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