"Zeolite-Catalysed Acetylation of Alkenes with Acetic Anhydride"

Keith Smith, Zhao Zhenhua, Lionel Delaude, and Philip K. G. Hodgson

journal cover 
          source: Studies in Surface Science and Catalysis
            year: 1997
          volume: 108
      first page: 99
       last page: 106
            isbn: 0-444-82390-5
             doi: 10.1016/S0167-2991(97)80893-2

Abstract: Among various microporous adsorbents such as alumina, silica, clays, molecular sieves, etc., the HY zeolite was found to be best at promoting the acylation of 2,3-dimethyl-2-butene with acetic anhydride. The influence of numerous experimental parameters on the course of the reaction was investigated. Variations in the silica/alumina ratio of the zeolite, or in the relative proportions of reagents and catalyst, markedly affected the yield of 3,3,4-trimethyl-4-penten-2-one, whereas the reaction time and temperature were less influential. The procedure was extended to various other alkenes and it was possible to regenerate and to reuse the solid catalyst without significant loss of activity.

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