Investigations on 2,3′-biquinolyls. 15. Regioselectivity of the addition of nitromethane anion to 1′-alkyl-3′ -(2-quinolyl)quinolinium halides

1′-R-3′-(2-Quinolyl)quinolinium halides react with nitromethane forming products of addition at the position 4′, the 1′-R-4′-nitromethyl-1′,4′-dihydro-2,3′ -biquinolyls. A method has been developed for the synthesis of 1′-phenacyl-1′,4′-dihydro-2,3′-biquinolyls based on the alkylation of 1′,4′-dihydro-2,3′-biquinolyl with halogen derivatives in DMF.