Synthèse dans la chimie des phenanthridines. III. Préparation de quelques modèles d'acides ω‐(diamino ‐3,8 phenanthridinyl‐6) carboxyliques

New series of ω-(3,8-diamino-6-phenanthridinyl) alkanoic acids are obtained from the acid chloride-esters ROCO(CH2)nCOCl (n = 0,3 to 8; R = Me or Et). Reaction of these with 2-amino-3,8- dicarbethoxyaminobiphenyl leads to the expected 2-acylamino-3,8- dicarbethoxy-aminobiphenyls which by cyclization lead to the corresponding methyl or ethyl (3,8-dicarbe-thoxyamino-6-phenanthridinyl)alkanoates. Quaternarization followed by hydrolysis has been performed to obtain some ω-(3,8-diamino-6-phenanthridinium) alkanoic acid salts.