反应详情

温度

50 °C

2-Aminomethyl-5-methyl-2,3,6,7-tetrahydrofuro-[2,3-f]quinoline-7-one (3.00 g, 13.0 mmol) was dissolved in a solvent mixture of dimethylformamide (200 ml) and pyridine (100 ml). To this solution, N-carbobenzyloxy-α-methylalanine (4.64 g, 19.5 mmol) and WSC-HCl (3.48 g, 19.5 mmol) were added and the mixture was stirred at 50° C. for 48 hours. The reaction mixture was condensed under reduced pressure, and the residue was subjected to extraction using a solvent mixture (chloroform--methanol =4:1) combined with 1N-HCl. The organic phase was washed with saturated aqueous NaCl solution, followed by drying and condensing under reduced pressure. The resultant residue was purified by silica gel column chromatography (chloroform: methanol=25:1). The crude crystals were subjected to a recrystallizing procedure from chloroform--methanol. As a result, 2.55 g of the title compound was obtained as colorless powdery crystals (43.7%).

1. customcondensed under reduced pressure
2. extractionthe residue was subjected to extraction
3. washThe organic phase was washed with saturated aqueous NaCl solution
4. customby drying
5. customcondensing under reduced pressure
6. customThe resultant residue was purified by silica gel column chromatography (chloroform: methanol=25:1)