反应详情

温度

120 °C

A mixture of (S)-tert-butyl 3-(4-chlorophenyl)-1-thioureidopropan-2-ylcarbamate (0.585 g, 1.70 mmol) and ethyl 2-bromo-2-(3,4-difluorophenyl)acetate (0.500 g, 1.79 mmol) in ethyl alcohol (2 mL) and diisopropylethylamine (0.3 mL) in a sealed vial (Biotage microwave vial, 5 mL) with a magnetic stirring bar was heated in a microwave oven (Initiator, Biotage) at 120° C. for 15 minutes. After cooling to ambient temperature, the volatiles were removed in vacuum. The residue was partitioned between EtOAc and water. The combined organic portions were washed with brine. The crude product was purified by flash column chromatography (20% of EtOAc in hexanes for 5 minutes, 20% to 100% of EtOAc in hexanes over 23 minutes). The product was obtained as a white solid, 0.201 g, 24%. 1H NMR (300 MHz, CD3OD) δ 1.22-1.39 (m, 9H), 2.52-2.97 (m, 2H), 3.35-3.60 (m, 1H), 3.64-3.85 (m, 1H), 3.92-4.24 (m, 1H), 7.11-7.46 (m, 7H). LCMS (API-ES): 496.1/498.1 (M++H), chloro pattern.

1. temperatureAfter cooling to ambient temperature
2. customthe volatiles were removed in vacuum
3. customThe residue was partitioned between EtOAc and water
4. washThe combined organic portions were washed with brine
5. customThe crude product was purified by flash column chromatography (20% of EtOAc in hexanes for 5 minutes, 20% to 100% of EtOAc in hexanes over 23 minutes)
6. customThe product was obtained as a white solid, 0.201 g, 24%