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    • 2. 发明授权
    • Process for acyloxylating side chains of alkyl-substituted aromatic compounds and catalysts used therefor
    • 用于烷基取代的芳族化合物的侧链酰氧基化方法和用于其的催化剂的方法
    • US06278019B1
    • 2001-08-21
    • US09284815
    • 1999-05-27
    • Jiro NakataniEiichi MinomiyaTetsuya KatoSatoru Miyata
    • Jiro NakataniEiichi MinomiyaTetsuya KatoSatoru Miyata
    • C07C6364
    • C07C67/00B01J21/18B01J23/002B01J23/80B01J27/128B01J29/106B01J29/46B01J29/7215B01J37/03B01J37/088C07C67/035C07C67/39C07C253/30C07C69/007C07C69/16C07C69/157C07C69/63C07C255/55
    • The present invention is a method for acyloxylating an alkyl group substituted aromatic compound at the side chain, by letting the alkyl group substituted aromatic compound and a carboxylic acid and/or a carboxylic anhydride react with each other in the presence of an oxygen containing gas. In this case, if (1) a solid catalyst in which at least one selected from cobalt, cerium and manganese is supported on a solid material or (2) a catalyst containing at least one selected from cobalt oxides, cerium oxides and manganese oxides is used, an alkali group substituted aromatic compound and a carboxylic acid and/or a carboxylic anhydride can be caused to react with each other efficiently in the presence of an oxygen containing gas, and in addition the catalyst can be easily separated from the reaction solution. Furthermore, (3) a compound diacyloxylated at the side chains can be highly selectively produced if a cerium compound is used as a catalyst in the absence of a cobalt compound and a manganese compound. Moreover, the present invention relates to a method for producing a cinnamic acid by letting a benzylidene diacetate react in the presence of a basic catalyst. The alkyl group substituted aromatic compounds acyloxylated and diacyloxylated at the side chain obtained in the present invention are useful for perfumes, and the benzyl alcohols and benzaldehydes obtained by hydrolyzing them are useful for intermediate products of agricultural chemicals, drugs and perfumes and also for resin additives. The cinnamic acids produced according to the present invention are useful for intermediate products of agricultural chemicals, drugs and perfumes.
    • 本发明是通过在含氧气体的存在下使烷基取代的芳香族化合物和羧酸和/或羧酸酐反应而使侧链上的烷基取代芳香族化合物酰化而成的方法。 在这种情况下,如果(1)其中选自钴,铈和锰中的至少一种负载在固体材料上的固体催化剂或(2)含有选自氧化钴,氧化铈和氧化锰中的至少一种的催化剂是 使用时,可以在含氧气体的存在下使碱基取代的芳香族化合物和羧酸和/或羧酸酐有效反应,另外,催化剂也容易与反应溶液分离。 此外,如果在没有钴化合物和锰化合物的情况下使用铈化合物作为催化剂,则可以高选择性地制备(3)侧链二酰氧基化的化合物。此外,本发明涉及一种制备 通过使亚苄基二乙酸酯在碱性催化剂存在下反应,得到肉桂酸。在pr中获得的侧链上被酰氧基化和二酰氧基化的烷基取代的芳族化合物 本发明可用于香料,通过水解获得的苄醇和苯甲醛可用于农药,药物和香料以及树脂添加剂的中间产物。 根据本发明生产的肉桂酸可用于农药,药物和香料的中间产物。