The isolation of 2,3-dimethyl-8-ethylquinoline from the kerosene distillate of California petroleum

The isolation of 2,3-dimethyl-8-ethylquinoline (I) from the complex mixture of bases, obtained from the kerosene distillate of California asphalt-base petroleum is described. The structure assigned this product has been confirmed by synthesis. 2,3-Dimethylquinoline (II) and 3-methyl-8-ethylquinoline (III) were obtained by indirect dealkylation of base I at positions 8 and 2, respectively. Base II is one of the kero quinolines which were isolated in the Texas Laboratory prior to the present investigation. Base III being a new quinoline homolog, its structure was established by synthesis