N-bromobutanimide → HCID 89739210, compound

Participants

Reaction Steps

To a solution of tert-butyl 4-(6-aminopyridin-2-yl)piperazine-1-carboxylate (1.9 g, 8 mmol) in N,N-dimethylformamide (20 ml) was added dropwise 1-bromopyrrolidine-2,5-dione (1.4 g, 8 mmol) at 0° C. The reaction was allowed to stirred for 4 h at rt. The reaction mixture was quenched with water (30 mL), and extracted with acetic ester (30 mL×3). The combined organic phase was dried by anhydrous sodium sulphate, and then filtered. The filtrate was concentrated and purified by column chromatograph silica gel (elute: petroleum ether/ethyl acetate=1:1) to give tert-butyl 4-(6-amino-5-bromopyridin-2-yl)piperazine-1-carboxylate (0.2 g, 8.2%) as a yellow solid. LCMS (M+H) m/z: calcd. 356.08. found 357.

Provenance & Evidence