反应详情

温度

50 °C

A solution of (R)-2-(5-phenyl-benzofuran-2-ylmethoxycarbonylamino)-3-phenyl-propionic acid methyl ester 18 (1.39 g, 3.24 mmole) in methanol (30 ml) was treated with a solution of lithium hydroxide monohydrate (149 mg, 3.56 mmole) in water (2 ml) and heated to 50° C. for 3 hrs. It was then cooled to room temperature, acidified with 1M HCl, extracted with ethyl acetate, separated, washed, dried, and evaporated. The residue was crystallized to give about 1.13 g of (R)-2-(5-phenyl-benzofuran-2-ylmethoxycarbonylamino)-3-phenyl-propionic acid 19, mp. 154-156° C.

1. temperatureIt was then cooled to room temperature
2. extractionextracted with ethyl acetate
3. customseparated
4. washwashed
5. customdried
6. customevaporated
7. customThe residue was crystallized