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Synfacts 2009(11): 1293-1293
DOI: 10.1055/s-0029-1218060
DOI: 10.1055/s-0029-1218060
Polymer-Supported Synthesis
© Georg Thieme Verlag
Stuttgart ˙ New York
The Aerobic Oxidation of Benzylic Alcohols with F-MSS Catalyst
L. Lang, B. Li, W. Liu, X. Li, Z. Xu*
Nanjing University, P. R. of China
Further Information
Publication History
Publication Date:
22 October 2009 (online)
Significance
A magnetically active core-shell-structured γ-Fe2O3-mesoporous silica sphere (F-MSS) catalyst was developed for the aerobic oxidation of benzylic alcohols. Thus, F-MSS was prepared by transferation of Fe3O4 (chloroform dispersion) from chloroform to water with cetyltrimethylammonium bromide (CTBA) as a phase-transfer agent, followed by formation of silica sol-gel on Fe3O4 with tetraethyl orthosilicate (TOES) and calcination at 500 ˚C. The aerobic oxidation of benzylic alcohols was performed with oxygen bubbling in the presence of F-MSS in PEG-200 to give the corresponding aldehydes in 60-94% conversion with 84-98% selectivity (3 examples).