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    • 6. 发明授权
    • Preparation of cyclopentenones
    • 环戊烯酮的制备
    • US06828464B2
    • 2004-12-07
    • US10718795
    • 2003-11-24
    • Shelue LiangRolf-Hartmuth FischerSylvia Huber-DirrAndrea Haunert
    • Shelue LiangRolf-Hartmuth FischerSylvia Huber-DirrAndrea Haunert
    • C07C4554
    • B01J23/04C07C45/48Y02P20/582C07C49/597
    • The present invention provides a process for preparing 2-cyclopentenones of the general formula: where R1 to R4 are each hydrogen atoms or are alkyl or alkenyl radicals having from 1 to 12 carbon atoms, cycloalkyl or cycloalkenyl radicals having from 5 to 7 carbon atoms, aralkylene or aryl radicals, by converting hexenedioic acids and/or their esters of the general formulae where R1 to R4 are each as defined above and R5 and R6 are each hydrogen atoms or are alkyl radicals having from 1 to 12 carbon atoms, cycloalkyl radicals having 5 or 6 carbon atoms, aralkyl or aryl radicals, at temperatures of from 150 to 450° C., over solid, oxidic catalysts, wherein the catalysts on an oxidic support material comprise from 0.01 to 5% by weight of at least one alkali metal oxide.
    • 本发明提供一种制备以下通式的2-环戊烯酮的方法:其中R 1至R 4各自为氢原子或具有1至12个碳原子的烷基或烯基,环烷基或环烯基具有 5-7个碳原子的亚芳基或芳基,通过将通式R 1至R 4的通式所示的己烯二酸和/或它们的酯各自如上所定义,R 5和R 6各自为 氢原子或具有1至12个碳原子的烷基,具有5或6个碳原子的环烷基,芳烷基或芳基,在150-450℃的温度下,在固体,氧化催化剂上,其中催化剂在 氧化载体材料包含0.01至5重量%的至少一种碱金属氧化物。