反应详情

To a mixture containing 5,6-diphenyl-2-pyrazinol (2.45 g), 4-[2-(methanesulfonyloxy)ethoxy]benzaldehyde (2.44 g), and potassium carbonate (1.8 g), dimethylformamide (100 mL) was added. The resultant mixture was heated at 100° C. on an oil bath for two hours under stirring, and the reaction mixture was poured into an ice-water mixture. The thus-formed organic matter was separated through extraction by use of ethyl acetate, followed by washing sequentially with water and saturated saline. The washed product was dried over sodium sulfate anhydrate, and the residual solvent was removed through distillation under reduced pressure. The thus-yielded residue was purified by means of a silica gel column and crystallized from n-hexane, to thereby yield 3.34 g of the title compound (yield 85.4%).

1. additionwas added
2. customThe thus-formed organic matter was separated through extraction by use of ethyl acetate
3. washby washing sequentially with water and saturated saline
4. dry with materialThe washed product was dried over sodium sulfate anhydrate
5. customthe residual solvent was removed through distillation under reduced pressure
6. customThe thus-yielded residue was purified by means of a silica gel column
7. customcrystallized from n-hexane