反应详情

温度

110 °C

To a stirred solution of 4-nitrobenzoyl chloride (6.23 g, 33.9 mmol) and N-phenyl piperazine (4.71 ml, 30.8 mmol) in anhydrous dioxane (250 ml) at 0° C. was added triethylamine (4.73 ml, 33.9 mmol) and the mixture was then stirred at reflux (110° C.) for 5 hours. The reaction was allowed to cool then quenched with water (100 ml) and the resulting aqueous mixture was extracted with ethyl acetate (2×75 ml). The organic extracts were combined, dried over magnesium sulfate and concentrated to yield crude product as a yellow oil. Pure product was obtained by crystallisation from a mixture of 40% ethyl acetate in petrol to afford the title compound as a white crystalline solid (6.5 g, 62%). HPLC retention time 6.9 min. Mass spectrum (ES+) m/z 312 (M+H).

1. temperatureto cool
2. customthen quenched with water (100 ml)
3. extractionthe resulting aqueous mixture was extracted with ethyl acetate (2×75 ml)
4. dry with materialdried over magnesium sulfate
5. concentrationconcentrated
6. customto yield crude product as a yellow oil