Amino benzoic acid modified silica--an improved catalyst for the mono-substituted product in the benzylation of toluene with benzyl chloride.
Iron and 4-(methylamino)benzoic acid have been successfully incorporated into silica extracted from rice husk. The silica/Fe/amine complex, RH-Fe(5% amine), showed a ca. 24% increase in specific surface area compared to RH-Fe. This increase was attributed to the templated formation of regular pores. The XRD showed the RH-Fe(5% amine) to be amorphous. The Friedel-Crafts benzylation reaction with toluene using RH-Fe(5% amine) showed a drastic reduction in the di-substituted products to ca. 1.0%.
Adam
Farook
F
School of Chemical Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia. farook@usm.my
Andas
Jeyashelly
J
D010129:4-Aminobenzoic Acid / Q000737:chemistry; D001593:Benzyl Compounds / Q000737:chemistry*; D002384:Catalysis; D007501:Iron / Q000737:chemistry; D046529:Microscopy, Electron, Transmission / Q000379:methods; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000737:chemistry*; D010316:Particle Size; D012680:Sensitivity and Specificity; D012822:Silicon Dioxide / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods; D013499:Surface Properties; D014050:Toluene / Q000737:chemistry*; D014961:X-Ray Diffraction; D062366:para-Aminobenzoates
D001593:Benzyl Compounds; D009942:Organometallic Compounds; D062366:para-Aminobenzoates; C019005:4-methylaminobenzoic acid; D014050:Toluene; D012822:Silicon Dioxide; C021292:benzyl chloride; D007501:Iron; D010129:4-Aminobenzoic Acid