N-bromobutanimide → HCID 90304142, compound

Participants

Reaction Steps

To a solution of 8-chloro-3-(1-methyl-4,5,6,7-tetrahydro-1H-indazol-4-yl)imidazo[1,5-a]pyrazine (1.0 g, 3.5 mmol) in DMF (20 mL) was added NBS (600 mg, 3.4 mmol) dropwise in DMF (20 mL) at 0° C. The mixture was stirred about 10 min under this condition, and then was poured into ice-water. The solid was filtered and dried under high vacuum to give 1-bromo-8-chloro-3-(1-methyl-4,5,6,7-tetrahydro-1H-indazol-4-yl)imidazo[1,5-a]pyrazine (200 mg, 15.6%). MS-ESI (m/z): 368 (M+1)+ (Acq Method: 10-80AB_2 min_220 &254.1 cm; Rt: 1.04 min)

Provenance & Evidence