Di-tert-butyl dicarbonate → Tert-butyl 4-(6-bromo-3-methoxy-2-pyridyl)-6-hydroxy-1,4-diazepane-1-carboxylate

Participants

Reaction Steps

A mixture of 1-(6-bromo-3-methoxy-2-pyridyl)-1,4-diazepan-6-ol (0.9968 mmol; 301.2 mg), tert-butoxycarbonyl tert-butyl carbonate (1.495 mmol; 326.3 mg), and sodium bicarbonate (9.968 mmol; 837.4 mg) in dichloromethane (20 Ml) was stirred at room temperature overnight. The mixture was concentrated, and the residue was purified on silica eluted with 0 to 40% EtOAc in DCM to afford tert-butyl 4-(6-bromo-3-methoxy-2-pyridyl)-6-hydroxy-1,4-diazepane-1-carboxylate (262.5 mg, 65%).

Provenance & Evidence