Synthesis of Substituted Benz[g]indole‐6,9‐diones and Benzo[h]quinoline‐7,10‐diones by Heterocyclization of 6‐Alkynyl‐5‐amino‐1,4‐naphthoquinones.

Abstract

Fused pyridine derivatives R 0450Synthesis of Substituted Benz[g]indole-6,9-diones and Benzo[h]quinoline-7,10-diones by Heterocyclization of 6-Alkynyl-5-amino-1,4-naphthoquinones.-Cross-coupling of 5-amino-6-iodonaphthoquinone (I) with terminal acetylenes followed by heterocyclization of the resulting acetylenic derivatives (V) provides convenient access to previously unknown heterocyclic systems fused to quinones, viz. benzindolediones such as (VI), (VII) and benzoquinolinediones such as (X). -(YAKOVLEVA, E. A.; IVANCHIKOVA, I. D.; SHVARTSBERG*, M. S.; Russ.