PROCESS FOR PREPARING (1R,2S,4R)-(-)-2-(2'-{N,N-DIMETHYLAMINO}-ETHOXY)-2- PHENYL-1,7,7-TRI-METHY1-BICYCLO 2.2.1HEPTANE AND PHARMACEUTICALLY ACCEPTABLE ACID ADDITION SALTS THEREOF

摘要

The invention relates to a process for preparing (1R,2S,4R) -(-)-2-[(2'- {N,N-dimethylamino} -ethoxy)] -2-[phenyI] -1,7,7-tri-[methyl] -bicyclo [2.2.1] heptane and pharmaceutically acceptable acid addition salts thereof with higher yields and higher grades of purity.