反应详情
EQUATION
反应方程式
REACTANTS
反应物
PRODUCTS
生成物
AUXILIARIES
试剂、催化剂与溶剂
CONDITIONS
反应条件
- 温度
- 0 °C
PROCEDURE
实验过程
To (S)-2-((tert-butoxycarbonyl)amino)propanoic acid (495 mg, 2.62 mmol) was added (S)-benzyl 2-amino-3-(pyridin-2-yl)propanoate TFA salt (0.82 g, 2.22 mmol), HOBt (482 mg, 3.57 mmol), HBTU (1.35 g, 3.57 mmol), and ACN (10 mL). The mixture was cooled to 0° C. and DIEA (1.46 mL, 8.88 mmol) was added. The reaction mixture was stirred at ambient temperature for 30 min then quenched with sodium bicarbonate (sat.), extracted with ethyl acetate (2×), dried with sodium sulfate, filtered, and concentrated to provided crude (S)-benzyl 2-((S)-2-((tert-butoxycarbonyl)amino)propanamido)-3-(pyridin-2-yl)propanoate as a colorless solid (0.46 g) that was carried forward without further purification. MS (EI) for C23H29N3O5, found 428.3 (MH+).
WORKUP
后处理
- customthen quenched with sodium bicarbonate (sat.)
- extractionextracted with ethyl acetate (2×)
- dry with materialdried with sodium sulfate
- filtrationfiltered
- concentrationconcentrated