Patent ID: 8207335
Filing Date: 2012-06-26
Classification: C07C,C07D

Abstract:
1. Method of preparing compounds of general formula I wherein m denotes the number 1 or 2, n denotes the number 0, 1 or 2, R 1 denotes C 1-3 -alkyl or C 3-6 -cycloalkyl and R 2 denotes H or C 1-3 -alkyl, the enantiomers, the diastereomers, the mixtures and the salts thereof, comprising the steps of: (a) reacting 3,5-dimethylanisol with chlorosulphonic acid; (b) reacting 4-methoxy-2,6-dimethylsulphonyl chloride obtained in step (a) with a compound of general formula II (c) reacting a compound of general formula III obtained in step (b) (d) coupling a compound of general formula V obtained in step (c) (e) isolating a compound of general formula I obtained in step (d).