Tert-butyl 4-(6-bromopyridin-2-yl)-6-oxo-1,4-diazepane-1-carboxylate → Tert-butyl 4-(6-bromopyridin-2-yl)-6-hydroxy-6-methyl-1,4-diazepane-1-carboxylate

Participants

Reaction Conditions

Reaction Steps

To a mixture of tert-butyl 4-(6-bromopyridin-2-yl)-6-oxo-1,4-diazepane-1-carboxylate (800 mg, 2.17 mmol) in THF (40 mL) at −78° C. was added CH3MgBr (169 mg, 1.44 mmol). The mixture was stirred at −78° C. for 2 hours, quenched with 10% NH4Cl solution (35 mL), extracted with DCM (100 mL×3), and concentrated under reduced pressure. The residue was purified by silica gel chromatography using DCM:MeOH (20:1˜10:1) as eluting solvents to afford tert-butyl 4-(6-bromopyridin-2-yl)-6-hydroxy-6-methyl-1,4-diazepane-1-carboxylate as a yellow solid (636 mg, 76%). MS (ESI) m/z: 386 [M+H]+.

Provenance & Evidence