Diisopropylethylamine → Tert-butyl 4-(6-bromopyrazin-2-yl)-1,4-diazepane-1-carboxylate

Participants

Reaction Conditions

Reaction Steps

A mixture of 2,6-dibromopyrazine (0.47 g, 2 mmol), tert-butyl 1,4-diazepane-1-carboxylate (0.4 g, 2 mmol), and DIPEA (0.78 g, 6 mmol) in EtOH (10 mL) was heated at 100° C. for 15 hours. The reaction mixture was concentrated under reduced pressure to give a residue. The residue was purified by silica gel chromatography using petroleum ether/ethyl acetate (5% to 50%) as eluting solvents to afford tert-butyl 4-(6-bromopyrazin-2-yl)-1,4-diazepane-1-carboxylate as colorless oil (0.5 g, 70%). MS (ESI) m/z: 357 [M+H]+.

Provenance & Evidence