反应详情

温度

120 °C

A solution of crude ethyl 6-bromo-4-hydroxy-1,1-dimethyl-2-oxo-naphthalen-3-carboxylate (4100 mg, 12088 μmol) and glycine tert-butyl ester hydrochloride (2229 mg, 13297 μmol) in 1,4-dioxane (100 mL) was treated with DIPEA (4211 μL, 24176 μmol). The reaction was heated at 120° C. in a sealed vessel. After 17 hours, the reaction was cooled to 23° C., diluted with EtOAc (200 mL) and washed with 10% HCl solution (2×150 mL) and brine (100 mL). The organic layer was dried over MgSO4, concentrated in vacuo, and purified by silica gel chromatography (eluant: 5-10% EtOAc/hexane) affording 2523 mg of 1,1-dimethylethyl N-((6-bromo-4-hydroxy-1,1-dimethyl-2-oxo-naphthalen-3-yl)carbonyl)glycinate. MS m/e=422.0 (M−H)−.

1. temperaturethe reaction was cooled to 23° C.
2. washwashed with 10% HCl solution (2×150 mL) and brine (100 mL)
3. dry with materialThe organic layer was dried over MgSO4
4. concentrationconcentrated in vacuo
5. custompurified by silica gel chromatography (eluant: 5-10% EtOAc/hexane)