反应详情

To a solution of 2-amino-5-(2-pyrrolidin-1-yl-ethyl)-benzoic acid methyl ester (1.04 g, 4.19 mmol) in a mixture of THF (8 mL) and methanol (5 mL) was added lithium hydroxide (0.36 g), followed by water (3 mL). The reaction mixture was stirred at room temperature overnight, and then refluxed for 4 hours. After cooling to room temperature, the was solvent concentrated. The pH was adjusted to approximately 5 with 2 N aqueous hydrochloric acid and the residue was evaporated to dryness to give 2-amino-5-(2-pyrrolidin-1-yl-ethyl)-benzoic acid as a chloride salt. Yield: 1.84 g. The crude material was used in the next step without further purification.

1. temperaturerefluxed for 4 hours
2. temperatureAfter cooling to room temperature
3. concentrationthe was solvent concentrated
4. customthe residue was evaporated to dryness