Coordination Compounds of Substituted 1,10-Phenanthrolines and Related Dipyridyls. I. Synthesis of 2,9-Dimethyl-1,10-phenanthroline

Abstract

A direct synthesis of 2,9-dimethyl-1,10-phenanthroline has been developed. The method involves a Skraup type of reaction between o-phenylenediamine, crotonaldehyde, and either arsenic(V) oxide or sodium m-nitrobenzenesulphonate. Some derivatives of 2,9-dimethyl-1,10-phenanthroline have been characterized.