Investigations on 2,3′-biquinolines 22. Novel and convenient method for the synthesis of benzo[5,6]indolizino-[2,1-b]quinolinium-13-thiolates and benzo-[5,6]indolizino[1,2-c]quinoline-6(5H)-thiones
Investigations on 2,3′-biquinoline series. 19. Regioselectivity of the reaction of 1,1′-dialkyl-3,3′-di(2-quinolyl)-1,1′,4,4′-tetrahydro-4,4′-biquinolines with organomagnesium and organolithium compounds