Chemical process

Details Chemical process Chemical process

C - Chemistry, Metallurgy

07

D

C07D 473/04 (2006.01) A61K 31/52 (2006.01) C07D 473/06 (2006.01)

Patent

CA 2055946

A B S T R A C T The present invention relates to compounds of the general formula I Image and salts thereof - wherein R stands for hydrogen or C1-4 straighed or branched chain alkyl, which are prepared by a) reacting a compound of the general formula II Image - wherein X stands for halogen or sulphonic acid ester - with a compound of the general formula III Image - wherein R stands as given above - or b) reacting a salt of the compound of the general formula III - wherein R is as given above - with a compound of the general formula II - wherein X is halogen or sulphonic acid ester group. The compounds of the formula I are used as cough relievers.

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