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    • 10. 发明申请
    • PROCESS FOR PRODUCING HINOKITIOL
    • 生产工艺的过程
    • WO99050215A1
    • 1999-10-07
    • PCT/JP1999/001583
    • 1999-03-29
    • C07C45/42C07C45/69C07C49/717C07C45/64
    • C07C49/717C07C45/42C07C45/69C07C2601/18Y02P20/582C07C49/693
    • A process for producing hinokitiol which comprises obtaining 1-isopropylcyclopentadiene from cyclopentadiene and an isopropylating agent represented by the general formula R-X (wherein R represents isopropyl; and X represents halogeno, etc.) (the step 1); reacting the obtained product with a dihaloketene to give a ketene-adduct (the step 2); and then decomposing this ketene-adduct (the step 3); wherein the above step 1 involves the following three steps: (a) the step of preparing a cyclopentadienyl metal; (b) the step of isopropylating the cyclopentadienyl metal in an aprotic polar solvent to give isopropylcyclopentadiene; and (c) the step of isomerizing 5-isopropylcyclopentadiene contained in the product selectively into 1-isopropylcyclopentadiene under heating.
    • 制备桧醇的方法,其包括从环戊二烯获得1-异丙基环戊二烯和由通式R-X表示的异丙基化剂(其中R表示异丙基; X表示卤代等)(步骤1); 使所得产物与二卤代烯酮反应,得到乙烯酮加合物(步骤2); 然后分解该乙烯酮加合物(步骤3); 其中上述步骤1涉及以下三个步骤:(a)制备环戊二烯基金属的步骤; (b)在非质子传递极性溶剂中异丙基化环戊二烯基金属以得到异丙基环戊二烯的步骤; 和(c)在加热下将产物中所含的5-异丙基环戊二烯选择性异构化成1-异丙基环戊二烯的步骤。