| 摘要 |
An intermediate compound for preparing ubiquinone and a method for preparing thereof are provided to be able to obtain ubiquinone with high yield and high quality through simple product purification process at relatively cheap cost. The method for preparing a compound represented by the formula(II) or a compound represented by the formula(III) comprises a step of reacting a compound represented by the formula(IV) or a compound represented by the formula(V) with a silylating compound such as trimethylchlorosilane, hexamethyldisilazane, and N,O-bis(trimethylsilyl)acetamide in the presence of an organic polar solvent such as CH2Cl2, 1,2-dichloroethane, acetonitrile and dimethylformamide so as to protect OH group of hydroquinone in the compound of the formula(IV) or the compound of the formula(V). In the formulae, R is alkyl or alkoxy, Z is H or halogen, Y is H, benzene sulfonyl or toluene sulfonyl, and n is an integer from 0 to 9.
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