反应详情

A solution of 105 mg (0.577 mmol) 5-methoxy-3-methyl-pyrazine-2-carboxylic acid methyl ester in 2.6 ml THF was cooled to 0. ° C., 0.635 ml (0.635 mmol) 1N sodium hydroxide was added dropwise and the mixture was stirred at room temperature for 1.5 h. After re-cooling to 0° C. 0.635 ml (0.635 mmol) 1N HCl and 1.2 ml toluene were added and the solvents were evaporated to provide the title compound together with sodium chloride as brownish solid. The mixture was used for coupling reactions without further purification.

1. temperatureAfter re-cooling to 0° C
2. customthe solvents were evaporated