反应详情

To a mixture of ethyl 3-{[(4-{[cyclopentyl(3-methyl-1-benzothiophen-2-yl)methyl]amino}phenyl)carbonyl](methyl)amino}propanoate (228 mg) synthesized above, tetrahydrofuran (5 mL) and ethanol (5 mL) was added 1N aqueous sodium hydroxide solution (2.00 mL), and the mixture was stirred at room temperature for 3 hr, and concentrated under reduced pressure. The residue was dissolved in water (10 mL), and 1N hydrochloric acid (2.00 mL) was added at 0° C. The resulting precipitate was collected by filtration to give the title object compound (198 mg, 92%) as a white solid.

1. concentrationconcentrated under reduced pressure
2. dissolutionThe residue was dissolved in water (10 mL)
3. addition1N hydrochloric acid (2.00 mL) was added at 0° C
4. filtrationThe resulting precipitate was collected by filtration