Extremely pure (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 and process for preparing such compounds as well as medicaments containing 1 or more of such compounds and their use

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.