Synthèse Dans La Chimie Des Phenanthridines. II. Préparation D'Une Nouvelle Série D'ω‐(Phenanthridinyl‐6) Alcanoates De Méthyle Ou D'Éthyle

A new series of methyl and ethyl w-(6-phenanthridinyl) alkanoates is easily synthesised from the acid chloride-esters ROCO(CH2)nCOCl (n=0,3 to 8; R=Me or Et). Reaction of these with o-aminobiphenyl leads to the expected amide-esters which are cyclised to phenanthridines quaternised to the corresponding phenanthridinium salts.