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- W2356553744 abstract "3,3,4-Trimethyl-4-penten-2-one(TMP)was synthesized by the acylation of 2,3-dimethyl-2-butene(DMB)with acetic anhydride in the presence of zinc chloride.Zinc chloride is an effective catalyst for the acylation of 2,3-dimethyl-2-butene by acetic anhydride at room temperature.An appropriate molar ratio of 2,3-dimethyl-2-butene/ZnCl_2 is 1∶0.4.In the case of using ZnCl_2 catalysts obtained under the different treatment conditions,almost the same yields of the acylated product are obtained.When the acetic anhydride/olefin molar ratio is 1∶1 or 2∶1,ZnCl_2 dissolves only partially in the liquid phase,and a low yield of the acylated product is obtained.An excess of olefin produces a negative effect on the reaction.Theacylation of 2,3-dimethyl-2-butene by acetic anhydride using zinc chloride as catalyst needs only a lowreaction temperature(usually at room temperature) to achieve a high yield of the acylated product.The effect of reaction time on the yield of TMP depends upon the amount of the catalyst used,in general,in the case of using small amounts of catalyst longer times lead to a rise in the yield.The addition of a given amount of acetic acid to the reaction system decreases markedly the rate of the acylation reaction.The order of addition of the reagents has no significant effect on the acylation reaction studied in this paper." @default.
- W2356553744 created "2016-06-24" @default.
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- W2356553744 date "2005-01-01" @default.
- W2356553744 modified "2023-09-27" @default.
- W2356553744 title "Studies on Catalytic Synthesis of 3,3,4-Trimethyl-4-penten-2-one" @default.
- W2356553744 hasPublicationYear "2005" @default.
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