PROCESS FOR OBTENTION OF PERIPHERAL OPIATE ANTAGONISTS

摘要

IN THE CANADIAN PATENT AND TRADEMARK OFFICE PATENT APPLICATION entitled : PROCESS FOR OBTENTION OF PERIPHERAL OPIATE ANTAGONISTS In the names of Alberto BIANCHETTI Dino NISATO Luciano MANARA Roberto SACILOTTO assignee : Societe anonyme styled : SANOFI 40, Avenue George V 75008 PARIS Methyllevallorphanium salts having peripheral antagonistic activity of formula Yn(-) wherein Yn(-) represents the anion of a pharmaceutically acceptable acid other than halogen and n represents the number of negative charges of said anion are obtained by exchange of the halogen ion with the yn(-) anion.