High purity (1R, 2S, 4R)-(-)-2-((2'-(N,N-dimethylamino)-ethoxy))-2-(phenyl)-1,7,7-tri-(methyl)-bicyclo(2.2.1)heptane and pharmaceutically acceptable acid addition salts thereof, process for the preparation of these compounds and medicaments containing them

摘要

The invention relates to a process for preparing (1R,2S,4R)-(-)-2-Ä(2'-äN,N-dimethylaminoü-ethoxy)Ü-2--ÄphenylÜ-1,7,7-t ri-ÄmethylÜ-bicycloÄ2.2.1Üheptane and pharmaceutically acceptable acid addition salts thereof with higher yields and higher grades of purity.