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    • 5. 发明授权
    • Processes for preparing alkylated indanes and tetrahydronaphthalenes
    • 烷基化烷烃和四氢萘的制备方法
    • US5087785A
    • 1992-02-11
    • US621688
    • 1990-12-03
    • Walter C. Frank
    • Walter C. Frank
    • C07C5/29
    • C07C5/29C07C2102/08C07C2102/10
    • Improved processes for the production of secondary alkyl indanes, particularly mixtures of 1,1,3,5-tetramethyl-3-isopropylindanes and 1,3,3,5-tetramethyl-3-isopropylindane, and alkylated tetrahydronaphthalenes, particularly mixtures of 1,1,3,4,4,6-hexametyl-1,2,3,4-tetrahydronaphthalene and 1,1,2,4,4,6-hexamethyl-1,2,3,4-tetrahydronaphthalene, are described. In the processes of the invention, alkylated tetrahydronaphthalenes or secondary alkyl indanes are isomerized in the presence of a Lewis acid and a solvent which may be a halogenated or unhalogenated solvent and, optionally, a phase transfer agent, to produce, in the case of an alkylated tetrahydronaphthalene starting material, a secondary alkyl indane, and in the case of a secondary alkyl indane starting material, an aklylated tetrahydronaphthalene. The Lewis acid is present in the reaction medium in an amount of less than about 50 mole percent based on the amount of the alkylated tetrahydronaphthalene or secondary alkylindane charged. The subject processes produce the desired compounds at a high rate of reaction, using better, safer, more convenient, or less expensive process methodology than many processes known heretofore.
    • 用于制备仲烷基烷烃,特别是1,1,3,5-四甲基-3-异丙基丁烷和1,3,3,5-四甲基-3-异丙基茚的混合物的改进方法和烷基化四氢萘,特别是1, 1,3,4,4,6-六甲基-1,2,3,4-四氢化萘和1,1,2,4,4,6-六甲基-1,2,3,4-四氢化萘。 在本发明的方法中,烷基化四氢萘或仲烷基烷基烷烃在路易斯酸和可以是卤化或非卤化溶剂的溶剂和任选的相转移剂的存在下异构化,以产生 烷基化四氢萘原料,仲烷基二氢化茚,在仲烷基二氢化茚起始原料的情况下为烷基化四氢萘。 路易斯酸以反应介质中的烷基化四氢萘或仲烷基二烷基的加入量少于约50摩尔%的量存在。 使用比迄今为止已知的许多方法更好,更安全,更方便或更便宜的方法方法,本发明方法以高反应速率产生所需化合物。