• friedel–crafts propionylation of veratrole to 3,4-dimethoxypropiophenone over superacidic udcat-5 catalyst

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
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     3,4-dimethoxypropiophenone (3,4-dmpp) is of considerable commercial importance due to its use in fine chemical and drug industries. 3,4-dmpp is traditionally produced by the friedel–crafts propionylation of veratrole using homogeneous catalysts which are highly polluting. zeolites have also been used but they are known to deactivate rapidly. a variety of novel solid acid catalysts such as udcat-4 (persulfated alumina zirconia on hexagonal mesoporous silica, hms), udcat-5 (superacidic modified sulfated zirconia) and udcat-6 (modified sulfated zirconia nanoparticles on hms) were synthesized in our laboratory and characterized. amongst them udcat-5 was the most active and selective. the current work deals with development of clean and benign route for 3,4-dmpp synthesis using udcat-5 as catalyst in the absence of any solvent. effects of various parameters were studied in order to optimize the conversion of veratrole and selectivity to 3,4-dmpp. based on the experimental data a suitable mathematical model was developed to represent the reaction kinetics.

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