Preparation process of naphthoquinone derivative and intermediat

Details Preparation process of naphthoquinone derivative and intermediat Preparation process of naphthoquinone derivative and intermediat

1994-07-26

1995-05-02

Mars, Howard T.

Organic compounds -- part of the class 532-570 series

Organic compounds

Cyclohexadiene having atoms double bonded directly at the 1-...

C07C 5000

Patent

active

054121248

ABSTRACT:
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.

REFERENCES:
patent: 4374775 (1982-02-01), Dotz
patent: 4853156 (1989-08-01), Ruttiman et al.

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