反应详情

To an ice-cooled suspension of 4-amino-8-bromo-cinnoline-3-carboxylic acid (360 mg, 1.34 mmol) in dimethylformamide (5 mL) was added CDI (370 mg, 2.3 mmol) and the mixture was stirred at room temperature for 1 hour. Additional DMF (14 mL) was added to enable stirring. After an additional 1 hour at room temperature, the mixture was treated with allyl amine (120 uL, 91 mg, 1.60 mmol) in one portion. The reaction was stirred at room temperature for 1 hour and then concentrated. Purification on silica gel using a gradient of 20 to 80% ethyl acetate in hexanes afforded the title compound (300 mg, 73%). 1H NMR (300.132 MHz, CDCl3) δ 8.14 (dd, J=7.4, 1.0 Hz, 1H), 7.83 (dd, J=8.4, 1.0 Hz, 1H), 7.51 (dd, J=8.4, 7.5 Hz, 1H), 6.04-5.91 (m, 1H), 5.33 (dq, J=17.1, 1.6 Hz, 1H), 5.21 (dq, J=10.4, 1.4 Hz, 1H), 4.15 (ddt, J=6.2, 5.8, 1.6 Hz, 2H). MS APCI, m/z=307/309 (M+H). HPLC 1.59 min.

1. stirringto enable stirring
2. waitAfter an additional 1 hour at room temperature
3. stirringThe reaction was stirred at room temperature for 1 hour
4. concentrationconcentrated
5. customPurification on silica gel using a gradient of 20 to 80% ethyl acetate in hexanes