反应详情

5.0 g (0.0188 mol) of 1-{6-[1-(2,6-Dimethyl-phenylimino)-ethyl]-pyridin-2-yl}-ethanone 1 (5.0 g, 0.0188 mol), 2.62 g (0.02445 mol) of ortho-tolylamine 5, 100 g of fresh molecular sieves, and 100 ml of toluene were kept at 100° C. for 3 days under the flow of nitrogen. The solvent was removed in a rotary evaporator and the residue was recrystallized from 20 ml of ethanol. The yield of (2,6-dimethyl-phenyl)-{1-[6-(1-o-tolylimino-ethyl)-pyridin-2-yl]-ethylidene}-amine 4 was 4.74 g (71%) as a yellow solid.

1. customThe solvent was removed in a rotary evaporator
2. customthe residue was recrystallized from 20 ml of ethanol