反应详情

(+/−)-3-{4-[(3,3-di methyl-cyclobutyl)-(3-methyl-quinolin-2-ylamino)-methyl]-benzoylamino}-propionic acid ethyl ester (Intermediate 27) (36 mg, 0.076 mmol) was dissolved in tetrahydrofuran (3 mL) and methanol (1 mL), and 1.0 M sodium hydroxide (2 mL) was added. This was stirred as a solution at room temperature for 45 min before 1 N HCl was added to bring to pH 4.5. This was extracted twice with ethyl acetate and the combined organics dried over MgSO4. The solution was concentrated in vacuo to give (+/−)-3-{4-[(3,3-dimethyl-cyclobutyl)-(3-methyl-quinolin-2-ylamino)-methyl]-benzoylamino}-propionic acid (40.8 mg) as a white solid impure with ethyl acetate. MS (M+1): 446.3. HPLC: XBridge C18 150 mm×4.6 mm, 5 μm column, flow rate 1.50 mL/min, linear gradient of 5% acetonitrile/water (0.1% trifluoroacetic acid modifier) to 100% acetonitrile over 11 min, Retention time=7.046 min.

1. additionwas added
2. extractionThis was extracted twice with ethyl acetate
3. dry with materialthe combined organics dried over MgSO4
4. concentrationThe solution was concentrated in vacuo