Investigation of the dimerization reaction of certain ?-substituted pyridine bases in the presence of metallic sodium and Raney Ni catalysts

Abstract

1. The dimerization ofβ-substituted pyridine bases depends effectively on the steric factors of the substituents in the pyridine ring. 2. The formation of the corresponding dimers from pyridine bases passes through a charge transfer complex in the first stage of the reaction with subsequent formation of anion radicals and paramagnetica complexes. 3. On interacting cordiamin with metallic sodium and Raney Ni newβ-substituted derivatives of 4,4′- and 2,2′-dipyridyls were obtained, viz. 3,3′-di-(N,N-diethylcarbamido)-4,4′-dipyridyl and 5,5′-di-(N,N-diethylcarbamido)-2,2′-dipyridyl.