Potassium Carbonate → Ethyl 4-((3-formyl-4-nitrophenyl)oxy)butyrate

Participants

Reaction Conditions

Reaction Steps

To a solution of 5-hydroxy-2-nitrobenzaldehyde (84.0 g) and ethyl 4-bromobutyrate (86 ml) in dry dimethylformamide (500 ml) blanketed under dry nitrogen was added potassium carbonate (76.0 g). The reaction mixture was heated to 100° C. for 1 hour. This mixture was cooled, and the solvent removed by evaporation to give a dark brown syrup. This residue was partitioned between ethyl acetate and saturated sodium carbonate (500 ml each). The organic layer was washed with additional saturated sodium carbonate (3×500 ml), and with brine (2×500 ml), dried, filtered and evaporated to give a dark brown syrup. Kugelrohr distillation (180° C., 0.2 mm) afforded ethyl 4-((3-formyl-4-nitrophenyl)oxy)butyrate (95 g) as a bright yellow syrup which slowly darkened upon standing.

Provenance & Evidence