Disclosed herein are a naphthoquinone derivative represented by the following formula: ##STR1## wherein R.sup.1 means a hydrogen atom or methyl group, R.sup.2 is a hydrogen atom or methyl group, n stands for 0 or an integer of 1-9, and a linkage is a single bond or double bond with the proviso that if n is an integer of 2-9, the linkages may be identical with or different optionally from each other, such as a vitamin K derivative; and a process for producing the naphthoquinone derivative at a high yield without forming any geometric isomer; as well as 1,4,4.sub.a,5,8,9.sub.a -hexahydro-4.sub.a .alpha.-alkenyl-1.alpha.,4.alpha.-methanoanthraquinone derivatives and 1,4,4.sub.a,5,8,9.sub.a -hexahydro-1.alpha.,4.alpha.-methanoanthraquinone derivatives which are useful as intermediates for the preparation of the naphthoquinone derivatives.
本公开涉及一种
萘醌衍
生物,其
化学式如下:##STR1## 其中,R.sup.1代表氢原子或甲基,R.sup.2代表氢原子或甲基,n表示0或1-9的整数,连接是单键或双键,但如果n是2-9的整数,则连接可以是相同的或不同的,例如
维生素K衍
生物;以及一种在高产率下制备
萘醌衍
生物且不形成任何几何异构体的方法;以及作为制备
萘醌衍
生物的中间体有用的1,4,4.sub.a,5,8,9.sub.a-六氢-4.sub.a .alpha.-烯基-1.alpha.,4.alpha.-甲基
蒽醌衍
生物和1,4,4.sub.a,5,8,9.sub.a-六氢-1.alpha.,4.alpha.-甲基
蒽醌衍
生物。