反应详情

温度

70 °C

To a solution of 2,6-dichloro-3-nitro-pyridine (0.75 g, 3.58 mmol) in DMF (30 ml) were added (R)-3-amino-3-phenylpropanoic acid ethyl ester (0.83 g, 4.29 mmol) and DIPEA (1.25 ml, 7.15 mmol). The reaction mixture was stirred at 70° C. overnight after which time it was poured into water (200 ml) and EtOAc. The layers were separated and the aqueous phase was extracted once more with EtOAc. The combined organics were washed with water twice and dried (MgSO4). Filtered and concentrated to give the crude product as an orange oil which was then purified by silica gel flash column chromatography (12 g silica gel, 5% EtOAc/Hexane) to afford 0.80 g (64%) of the title compound as a orange oil which was used without further purification.

1. customThe layers were separated
2. extractionthe aqueous phase was extracted once more with EtOAc
3. washThe combined organics were washed with water twice
4. dry with materialdried (MgSO4)
5. filtrationFiltered
6. concentrationconcentrated
7. customto give the crude product as an orange oil which
8. customwas then purified by silica gel flash column chromatography (12 g silica gel, 5% EtOAc/Hexane)