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    • 17. 发明授权
    • Hydroquinone derivatives and preparation thereof
    • 对苯二酚衍生物及其制备方法
    • US4270003A
    • 1981-05-26
    • US62031
    • 1979-07-30
    • Yoshiji FujitaTakashi OhnishiTakashi Nishida
    • Yoshiji FujitaTakashi OhnishiTakashi Nishida
    • C07C37/62C07C43/225C07C317/18C07C147/08C07C43/20C07C43/205
    • C07C317/18C07C41/22
    • The novel hydroquinone derivatives of the formula (I) are useful intermediates for the preparation of coenzyme Q, vitamin K and the polyprenyltrimethylquinones: ##STR1## wherein R.sup.1 is lower alkyl, lower alkoxy lower alkyl or methoxyethoxymethyl, R.sup.2 and R.sup.3 are each methyl or methoxy, or R.sup.2 and R.sup.3, taken together with the carbon atoms from which they depend, define a benzene ring, and R.sup.4 is a substituted or unsubstituted aromatic hydrocarbon. The compounds (I) are readily prepared either by reacting a Grignard reagent of the formula (II) with a halosulfone (III) in the presence of a copper compound, or by reacting a copper derivative (II') of the Grignard reagent (II) with a halo-sulfone (III), as follows: ##STR2## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are defined as above, and X is a halogen atom or a tosyl group.
    • 式(I)的新型氢醌衍生物是制备辅酶Q,维生素K和聚丙二酰基三甲基醌的有用的中间体:其中R 1是低级烷基,低级烷氧基低级烷基或甲氧基乙氧基甲基,R 2和R 3各自为 甲基或甲氧基,或R 2和R 3与它们相应的碳原子一起定义苯环,并且R 4是取代或未取代的芳族烃。 化合物(I)可以通过在铜化合物的存在下使式(II)的格氏试剂与卤代砜(III)反应,或者通过使格利雅试剂(II)的铜衍生物(II') )与卤代 - 砜(III)反应,如下:其中R 1,R 2,R 3和R 4如上定义,X​​为卤素原子或甲苯磺酰基。