Sn(IV) phosphonates as selective heterogeneous catalysts in the Baeyer-Villiger oxidations

INOR 863

Sharath R Kirumakki, skirumakki@mail.chem.tamu.edu1, Robert Harwell2, Jin Huang2, and Abraham Clearfield, clearfield@mail.chem.tamu.edu3. (1) Chemistry Department, Texas A&M University, College Station, TX 778432, (2) Chemistry Department, Texas A & M University, College Station, TX 77842, (3) Department of Chemistry, Texas A&M University, Corner of Spence and Ross, College Station, TX 77843-3255
Porous tin(IV) phosphonates with surface area ranging from 100-300 m2/g were synthesized. These materials were used as a heterogeneous catalyst for the liquid phase Baeyer-Villiger (BV) reaction with H2O2. An aromatic aldehyde, 4-methoxybenzaldehyde (I), is converted to its corresponding phenol, 4-methoxyphenol (II), with aq. H2O2 as the oxidant in the presence of the catalyst. This new catalytic system was found to be highly active and selective for this reaction. The pore size of the catalyst can be varied by varying the organic moiety and shape selectivity can be imparted to the catalyst. The Sn(IV) phosphonates were characterized using a combination of techniques including TEM, XPS, N2 sorption and NMR. The effect of the various synthetic parameters like temperature, solvent and synthesis time on the physico-chemical properties of the catalyst will be discussed.
 

Inorganic Catalysts
8:30 AM-11:50 AM, Wednesday, 13 September 2006 Moscone Center -- Room 302, Oral

Division of Inorganic Chemistry

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006