反应详情

Pyrrolidine-1,2-dicarboxylic acid 1-tert-butyl ester 2-[2-(3a,6a-dihydro-thieno[3,2-b]thiophen-2-yl)-2-oxo-ethyl]ester (595 mg, 1.5 mmol) was dissolved in DMF (7.5 mL) and treated with N-bromosuccinimide (295 mg, 1.65 mmol). The reaction mixture was stirred for 4d at RT then diluted with EtOAc and washed with saturated aqueous NaHCO3 and brine. The organic layer was dried over MgSO4, filtered and concentrated. The crude residue was purified by silica column chromatography (20% to 50% EtOAc/Hex) to afford the title compound (469 mg, 66%).

1. washwashed with saturated aqueous NaHCO3 and brine
2. dry with materialThe organic layer was dried over MgSO4
3. filtrationfiltered
4. concentrationconcentrated
5. customThe crude residue was purified by silica column chromatography (20% to 50% EtOAc/Hex)