反应详情

温度

100 °C

A mixture of N′-(6-dimethylaminomethylene-7-oxo-4,5,6,7-tetrahydro-benzothiazol-2-yl)-N,N-dimethyl-formamidine (200 mg, 0.72 mmol), N-phenyl-guanidine nitrate (142 mg, 0.72 mmol), NaOH (57 mg, 1.44 mmol) and 2-methoxyethanol (4 mL) was heated under microwave irradiation (300 W, 100° C.) for 30 min. The reaction mixture was concentrated under vacuum. Flash column chromatography (20% EtOAc:hexane) afforded the title product as a dark yellow solid (16 mg, 8%): mp 240° C. (dec). 1H-NMR (DMSO-d6): δ 9.42 (s, 1H, NH), 8.23 (s, 1H, Py-H), 7.77 (d, 2H, J 7.7, Ph-H), 7.26 (t, 2H, J 7.7, Ph-H), 6.91 (t, 1H, J 7.2, Ph-H), 2.93 (s, 4H, CH2—CH2). MS (ESI+): m/z 296.07 (M+H)+.

1. concentrationThe reaction mixture was concentrated under vacuum