The present invention relates to novel intermediates for the preparation of coenzymes, processes for the preparation of the intermediates and an improved process for the preparation of Coenzymes. The present invention particularly relates to an improved process for the preparation of Coenzyme Q, more particularly for Conenzyme Q
9
and Coenzyme Q
10
. Still more particularly this invention relates to regio and stereo controlled process for the preparation of Coenzyme Q
9
and Coenzyme Q
10
of the formula I
where n=9 (Coenzyme CoQ
9
), and where n=10. (Coenzyme CoQ
10
)
本发明涉及用于制备辅酶的新型中间体,制备中间体的方法以及制备辅酶的改进方法。本发明特别涉及一种用于制备
辅酶Q的改进方法,更具体地用于
辅酶Q9和
辅酶Q10。更具体地说,本发明涉及一种用于制备
辅酶Q9和
辅酶Q10的区域和立体控制方法,其
化学式为n=9(辅酶CoQ9),n=10(辅酶CoQ10)。