反应详情

温度

0 °C

To a stirring solution of tert-butyl azetidine-3-carboxylate (64.55 mg, 0.41 mmol) in DMF (1 mL) were added DIEA (169.6 mg, 1.31 mmol), and (S)-3-(4-(5-bromopyrimidin-2-yl)phenyl)-2-(5-(tert-butyl)thiophene-2-carboxamido)propanoic acid (100.0 mg, 0.21 mmol). The solution was cooled to 0° C. at ice bath and then HATU (74.11 mg, 1.31 mmol) in 1 mL DMF solution was slowly added. The reaction was stirred 1 hour at 0° C. and then warmed to RT with stirring for 2 hours. The reaction solution was extracted with DCM (3×10 mL) and aqueous NaHCO3 (3×10 mL). The combined organics were dried over MgSO4 and evaporated. to afford 117.6 mg (85%) of tert-butyl (S)-1-(3-(4-(5-bromopyrimidin-2-yl)phenyl)-2-(5-(tert-butyl)thiophene-2-carboxamido)propanoyl)azetidine-3-carboxylate INT-38 as a solid powder without further purification for next step. LCMS-ESI (m/z) calculated for C30H35BrN4O4S: 626.2. found 627.2 [M+H]+, tR=3.884 min. (Method 16).

1. temperaturewarmed to RT
2. stirringwith stirring for 2 hours
3. extractionThe reaction solution was extracted with DCM (3×10 mL) and aqueous NaHCO3 (3×10 mL)
4. dry with materialThe combined organics were dried over MgSO4
5. customevaporated