Process for the preparation of 3-methyl-7-fluoro-5-...

Details Process for the preparation of 3-methyl-7-fluoro-5-... Process for the preparation of 3-methyl-7-fluoro-5-...

C - Chemistry, Metallurgy

07

D

260/513, 260/579

C07D 333/58 (2006.01) C07C 205/56 (2006.01) C07C 205/58 (2006.01) C07D 333/54 (2006.01) C07D 495/14 (2006.01)

Patent

CA 1249284

ABSTRACT OF THE DISCLOSURE The invention relates to a novel process for preparing 3-methyl-7-fluoro-5-nitrobenzothiophene of the formula I below and to novel intermediates used in the process. The process has the following reaction sequence Image (II) (III) (IV) 7-fluorisatin acid Image (VII) (VI) (V) (3-fluoro-2-chloro-5-nitrobenzoyl)- 3-fluoro-2-chloro-5-nitro- malonate benzoic acid Image Image (VIII) (IX) 3-fluoro-2-chloro-5 nitroacetophenone (2-acetyl-6-fluoro-4-nitro-phenyl- thio)acetic acid Image Image (XI) (I) Compounds IV to IX are new. 7,8,9,10-Tetrahydrothieno[3,2-e]- pyrido-[4,3-b]-indoles (compounds XI) are active on the central nervous system.

475083

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