Abstract Chlorides of carboxylic, sulfonic and phosphoric acids proved to convert phenanthrene-9, 10-imine into the corresponding rearranged acet-sulfon-and phosphonamidophenanthrene. Trimethylchlorosilane and N, O-bis (trimethylsilyl) acetamide reacted with the imine without destruction of the aziridine ring. The silylated compound could be transferred into the respective N-substituted phenanthrene-9, 10-imines when treated ...