反应详情

A mixture of 3-[2-(4-hydroxy-phenyl)-morpholin-4-yl]-propionic acid tert-butyl ester (5.00 g; 16.3 mmol) and K2CO3 (6.74 g; 48.8 mmol) in CH3CN (100 mL) was stirred for one hour at RT. Subsequently 2,6-dichlorobenzyl bromide (4.29 g; 17.9 mmol) was added and the resulting mixture was stirred overnight at RT. The reaction mixture was partitioned between EtOAc (250 mL) and 5% aqueous NaHCO3 solution (100 mL). The layers were separated and the organic layer was dried (Na2SO4), filtered and concentrated in vacuo. The residue was purified by column chromatography (SiO2, Et2O/hexanes 1:1) to afford 3-{2-[4-(2,6-Dichloro-benzyloxy)-phenyl]-morpholin-4-yl}-propionic acid tert-butyl ester (7.40 g).

1. stirringthe resulting mixture was stirred overnight at RT
2. customThe reaction mixture was partitioned between EtOAc (250 mL) and 5% aqueous NaHCO3 solution (100 mL)
3. customThe layers were separated
4. dry with materialthe organic layer was dried (Na2SO4)
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customThe residue was purified by column chromatography (SiO2, Et2O/hexanes 1:1)