反应详情

温度

60 °C

Compound 216A (0.200 g, 0.858 mmol) and 4-(2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl)-2-trifluoromethylbenzonitrile (0.164 g, 0.616 mmol) were dissolved in benzene and heated at 60° C. for 14 h. The reaction was then cooled and concentrated in vacuo. The resulting orange oil was dissolved in EtOAc (15 mL) and 10% Pd/C (0.050 g) was added. Hydrogen was then introduced via a balloon. After 3 h, the reaction was filtered through Celite rinsing with EtOAc and concentrated in vacuo. The resulting crude material was purified by preparative TLC on silica eluting with 5% acetone in methylene chloride to give 0.166 g (54%) of compound 216B as a white solid. NMR spectroscopy showed only a single isomer which was determined to be exo by NOE experiments. HPLC: 95% at 3.200 min (retention time) (YMC S5 ODS column 4.6×50 mm eluting with 10–90% aqueous methanol over 4 minutes containing 0.2% phosphoric acid, 4 mL/min, monitoring at 220 nm). MS (ES): m/z 484.0 [M+H]+.

1. temperatureThe reaction was then cooled
2. concentrationconcentrated in vacuo
3. dissolutionThe resulting orange oil was dissolved in EtOAc (15 mL)
4. addition10% Pd/C (0.050 g) was added
5. additionHydrogen was then introduced via a balloon
6. filtrationthe reaction was filtered through Celite
7. washrinsing with EtOAc
8. concentrationconcentrated in vacuo
9. customThe resulting crude material was purified by preparative TLC on silica eluting with 5% acetone in methylene chloride