反应详情

温度

50 °C

A mixture of 5-bromonicotinic acid (20.0 g, 99 mmol), N-phenyl-o-phenylenediamine (19.32 g, 105 mmol), diisopropylcarbodiimide (DIC) (26.5 g, 210 mmol), and triethylamine (Et3N)(2.65 g, 27 mmol) in DCM (anhydrous, 350 mL) was heated to about 50° C. and degassed overnight under argon. After cooling to RT, the solids were then filtered off. The filtrate was washed with water (2×200 mL), dried over sodium sulfate and loaded onto silica gel. A flash column (gradient of 3% to 10% ethyl acetate in DCM) gave 30.32 g of 1E; 83% yield, pure by HNMR.

1. customdegassed overnight under argon
2. temperatureAfter cooling to RT
3. filtrationthe solids were then filtered off
4. washThe filtrate was washed with water (2×200 mL)
5. dry with materialdried over sodium sulfate