abstract |
The invention provides a multistep process for preparing 1,2-diamino compounds ofnformulan n wherein R 1 , R 1' , R 2 , R 2', R 3 and R 4 have the meaning given in the specification andnpharmaceutically acceptable addition salts thereof, from 1,2-epoxides of formulan wherein R 1 , R 1' , R 2 and R 2' have the meaning given in the specification. |