Dimethylformamide → 2-(5-chloro-2-oxo-1,3-benzoxazol-3(2H)-yl)-N-({5,6-dichloro-1-[2-(methoxymethoxy)ethyl]-1H-benzimidazol-2-yl}methyl)-N-methylacetamide

Participants

Reaction Conditions

Reaction Steps

To a mixture of 2-(5-chloro-2-oxo-1,3-benzoxazol-3(2H)-yl)-N-[(5,6-dichloro-1H-benzimidazol-2-yl)methyl]-N-methylacetamide (150 mg) and DMF (4.5 mL) were added K2CO3 (94 mg) and 1-bromo-2-(methoxymethoxy)ethane (80 μL), followed by heating and stirring at 70° C. for 5 hours. The reaction mixture was cooled to room temperature and then diluted with EtOAc. The organic layer was washed with water and brine in this order, dried over MgSO4, and then concentrated under reduced pressure. The residue was purified by silica gel column chromatography (eluent: Hex/EtOAc=50/50-0/100) to obtain 2-(5-chloro-2-oxo-1,3-benzoxazol-3(2H)-yl)-N-({5,6-dichloro-1-[2-(methoxymethoxy)ethyl]-1H-benzimidazol-2-yl}methyl)-N-methylacetamide (110 mg).

Provenance & Evidence