Kaczmarek, Lukasz et al. published their research in Monatshefte fuer Chemie in 1990 |CAS: 75449-26-2

The Article related to bipyridiyldiamine cyclocondensation benzimidate, dipyridodiazepine phenyl alkylation, diazepine phenyldipyrido alkylation, alkylation phenyldipyridodiazepine, alkylbipyridiyldiamine and other aspects.Name: [2,2′-Bipyridine]-3,3′-diamine

On October 31, 1990, Kaczmarek, Lukasz; Nantka-Namirski, Pawel published an article.Name: [2,2′-Bipyridine]-3,3′-diamine The title of the article was Synthesis of N-monosubstituted [2,2′-bipyridyl]-3,3′-diamines. And the article contained the following:

The cyclocondensation reaction of 2,2′-bipyridiyl-3,3′-diamine with PhC(:NH)OEt.HCl gave 6-phenyl-5H-dipyrido[3,2-d:2′,3′-f][1,3]diazepine. Alkylation of the latter gave N-benzoyl-N’-alkyl-2,2′-bipyridiyl-3,3′-diamines which upon hydrolysis gave N-alkyl-2,2′-bipyridiyl-3,3′-diamines I [R = Bu, Me2NCH2CH2CH2, [3-(4-chlorophenyl-1-piperazinyl)propyl]]. The experimental process involved the reaction of [2,2′-Bipyridine]-3,3′-diamine(cas: 75449-26-2).Name: [2,2′-Bipyridine]-3,3′-diamine

The Article related to bipyridiyldiamine cyclocondensation benzimidate, dipyridodiazepine phenyl alkylation, diazepine phenyldipyrido alkylation, alkylation phenyldipyridodiazepine, alkylbipyridiyldiamine and other aspects.Name: [2,2′-Bipyridine]-3,3′-diamine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem