Cesium carbonate → methyl N-(t-butyloxycarbonyl)-2-amino-2-[4-(2,6-dimethoxyphenyl)phenyl]acetate

Participants

Reaction Conditions

Reaction Steps

Under a nitrogen atmosphere, methyl N-(t-butyloxycarbonyl)-2-amino-2-(4-toluenesulfonyloxyphenyl)acetate (0.44 g, 1.0 mmol), cesium carbonate (0.65 g, 2.0 mmol), tricyclohexylphosphine (0.059 g, 0.2 mmol), bis(1,5-cyclooctadiene)nickel (0.028 g, 0.1 mmol) and 2,6-dimethoxyphenylboronic acid (0.36 g, 2.0 mmol) were mixed in dioxane (1 ml). The reaction mixture was heated to 70° C. and then stirred at the same temperature for 9 hrs. After the reaction was completed, the mixture was left to cool to room temperature and insoluble substances were filtered off. The filtrate was subjected to column chromatography purification to obtain methyl N-(t-butyloxycarbonyl)-2-amino-2-[4-(2,6-dimethoxyphenyl)phenyl]acetate (0.29 g, yield 72%) as pale yellow oil.

Provenance & Evidence