Novel Catalytic Acetylation of Alcohols with Preyssler's Anion, [NaP5Wa30O110]14– 1 |
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| Authors: | Alizadeh M H Razavi H Farrash Bamoharram F Hassanzadeh M K Khoshnavazi R Mohammadi Zonoz F |
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| Institution: | (1) Department of Pharmaceutical Chemistry, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran;(2) Department of Chemistry, Georgetown University, USA;(3) Department of Chemistry, Ferdowsi University of Mashhad, Iran |
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| Abstract: | Sodium 30-tungstopentaphosphate, the so-called Preyssler's anion with a formula of NaP5W30O110]14– (I) catalyzes the acetylation of alcohols (C
n
H2n + 1OH, n = 2, 3, 4, 5) with acetic acid. High yield is obtained with I as pure acid or supported on silica. Both homogeneous and heterogeneous catalysts are discussed and compared. H14NaP5W30O110], abbreviated as H14-P5, under homogeneous conditions, as well as supported on silica (heterogeneous conditions) is found to be an excellent catalyst. Our data indicate that, when the ammonium salt of I is employed as the catalyst, the yield increases as the alcohol carbon-chain is increased. This behavior is found to be quite general. The catalysts can be easily recovered and recycled with retention of their initial structure and activity. |
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