Preparation process of naphthoquinone derivative and...

Details Preparation process of naphthoquinone derivative and... Preparation process of naphthoquinone derivative and...

C - Chemistry, Metallurgy

07

C

C07C 50/14 (2006.01) C07C 46/00 (2006.01) C07C 49/617 (2006.01) C07C 49/653 (2006.01) C07C 50/10 (2006.01) C07C 50/22 (2006.01)

Patent

CA 2117412

Disclosed herein are a naphthoquinone derivative represented by the following formula: (See fig I) wherein R1 means a hydrogen atom or methyl group, R2 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 1,4,4a,5,8,9a-hexahydro-4a.alpha.-alkenyl- 1.alpha.,4.alpha.-methanoanthraquinone derivatives and 1,4,4a,5,8,9a- hexahydro-1.alpha.,4.alpha.-methanoanthraquinone derivatives which are useful as intermediates for the preparation of the naphthoquinone derivatives.

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