反应详情

温度

75 °C

2,4,5-Trimethyl oxazole (0.48 mL, 4.14 mmol) was dissolved in toluene (2.0 mL) and 4-(2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl)-2-trifluoromethylbenzonitrile (1.00 g, 3.76 mmol) was added. The reaction mixture was stirred at 75° C. under nitrogen for 2.5 hrs. The solution was cooled to room temperature and the resulting precipitate was filtered and rinsed with toluene to give 0.51 g (35%) of compound 211 as a light grey solid. NMR analysis revelaed that compound 211 was one isomer (exo/endo) however the identity of the isomer could not be determined by NMR analysis. HPLC: 100% at 2.85 min (retention time) (YMC S5 ODS column 4.6×50 mm eluting with 10-90% aqueous methanol over 4 minutes containing 0.1% TFA, 4 mL/min, monitoring at 220 nm). MS (ES): m/z 378.42 [M+H]+.

1. temperatureThe solution was cooled to room temperature
2. filtrationthe resulting precipitate was filtered
3. washrinsed with toluene