Author/Authors :
A.N Pârvulescu، نويسنده , , B.C. Gagea، نويسنده , , M Alifanti، نويسنده , , V Pârvulescu، نويسنده , , V.I. Pârvulescu، نويسنده , , S Nae، نويسنده , , A R?zu?، نويسنده , , G Poncelet، نويسنده , , P Grange، نويسنده ,
Abstract :
Silica-embedded tert-butyldimethylsilyltrifluoromethanesulfonate catalysts were synthesized by a sol-gel method in acidified CCl4, using hexadecyltrimethyl-ammonium bromide as a surfactant. The catalysts were characterized by nitrogen adsorption–desorption isotherms at 77 K; TG-DTA; 1H, 13C, and 29Si solid state MAS/NMR; XRD; XPS; Raman spectroscopy; and FTIR after adsorption of NH3. The characterization data indicated mesoporous solids in which most of the silyl-triflate derivative keeps its integrity. The catalytic tests performed with the methyl ester of 1-cyclopentenylacetic acid in various solvents showed that the reaction selectively leads to 3-methylbenzaldehyde and is sensitive to the solvent accepting ability.
