反应详情

A solution of (2Z,4E)-5-(benzofuran-2-yl)-2-methoxy-2,4-pentadienoic acid (122 mg, 0.5 mmol), 4-amino-2,2,6,6-tetramethylpiperidine (78 mg, 0.5 mmol), 1-hydroxy-7-azabenzotriazole hydrate (65 mg, 0.5 mmol) and 1-(3-dimethylaminopropyl)-3-ethylcarbodimide hydrochloride (95 mg, 0.5 mmol) in DMF (2 ml) was stirred at RT for 6 hours. The solution was poured into brine (20 ml) and repeatedly extracted with EtOAc. The organic phase was washed with 5% aqueous CaCO3, dried (MgSO4) and concentrated to give a solid that was repeatedly washed with isopropyl ether. After drying pure title compound (45 mg, 0.12 mmol, yield 23.5%) was obtained as pale yellow crystals, mp.=250° dec.

1. extractionrepeatedly extracted with EtOAc
2. washThe organic phase was washed with 5% aqueous CaCO3
3. dry with materialdried (MgSO4)
4. concentrationconcentrated
5. customto give a solid
6. washthat was repeatedly washed with isopropyl ether