A1 14777 by hydrogenation

Details A1 14777 by hydrogenation A1 14777 by hydrogenation

C - Chemistry, Metallurgy

07

C

260/472.3

C07C 69/76 (2006.01)

Patent

CA 1134384

- 1 - Abstract The present invention relates to a process for the preparation of 4-(61-methoxy-21-naphthyl)butan-2-one and to certain compounds for use in that process. British Patent Specification No. 1,474,377 discloses inter alia that 4-(61-methoxy-21-naphthyl) butan-2-one possesses useful anti-inflammatory activity. particularly favoured process has now been discovered that can be used to produce 4-(61-methoxy-21-naphthyl) butan-2-one in particularly good yield. The present invention provides a process for the preparation of 4-(61-methoxy-21-naphthyl)butan-2-one which process comprises the hydrogenation of a compound of the formula (I): Image (I) wherein Ar is a 6-methoxy-2-naphthyl group; X and Y are each hydrogen atoms or together represent a second bond between the carbon atoms to which they are attached; and R is a group such that -CO2R represents an ester group convertible by hydrogenation to a CO2H group.

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