反应详情

To a solution of 2-(azetidin-3-yloxy)-3-chloropyrazine (see PREPARATION P22.1; 0.38 g, 2.047 mmol), 1H-benzo[d]imidazole-2-carboxylic acid (0.37 g, 2.282 mmol), EDCI (0.392 g, 2.047 mmol), butanol (0.121 g, 0.790 mmol) and DCM (25 mL) was added DIPEA (0.62 mL, 3.56 mmol). After 2 hours, the crude reaction was adsorbed onto a plug of silica gel and chromatographed through a Redi-Sep® pre-packed silica gel column (12 g), eluting with 0% to 50% EtOAc in hexane, to provide (1H-benzo[d]imidazol-2-yl)(3-(3-chloropyrazin-2-yloxy)azetidin-1-yl)methanone (270 mg, 0.819 mmol, 40.0% yield), as a white solid. MS (ESI) m/z 330.0 (MH+). IC50 (uM) 1.375.

1. customthe crude reaction
2. customchromatographed through a Redi-Sep® pre-packed silica gel column (12 g)
3. washeluting with 0% to 50% EtOAc in hexane