反应详情

A solution of (4-bromo-1H-pyrrol-2-yl)methanamine (Enamine, Ltd., Kiev, Ukraine; 57.7 mg, 0.330 mmol), di(1H-imidazol-1-yl)methanone (CDI; Aldrich; 58.8 mg, 0.363 mmol), and NaH (60% wt. in mineral oil; 15.8 mg, 0.396 mmol) in THF (3.0 mL) was stirred under argon at 23° C. for 15 min. The reaction mixture was subsequently concentrated onto silica gel and chromatographically purified (silica gel, 0-60% EtOAc/hexanes) to provide 6-bromo-1H-pyrrolo[1,2-c]imidazol-3(2H)-one (23.9 mg, 0.119 mmol, 36% yield) as an off-white solid. 1H NMR (400 MHz, DMSO-d6) δ ppm 8.58 (1H, br. s.), 7.29 (1H, s), 6.16 (1H, d, J=1.2 Hz), 4.35 (2H, s). m/z (ESI, +ve) 200.9/202.9 (M+H)+.

1. concentrationThe reaction mixture was subsequently concentrated onto silica gel
2. customchromatographically purified (silica gel, 0-60% EtOAc/hexanes)