Dimethyl malonate → 2-(3-Bromo-5-chloro-phenyl)-malonic acid dimethyl ester

Participants

Reaction Conditions

Reaction Steps

1,3-Dibromo-5-chlorobenzene (25 g, 93 mmol), dimethyl malonate (23.4 mL, 204 mmol), and copper(I) bromide (29.2 g, 204 mmol) were combined in 1,4-dioxane (300 mL) and cooled to 0° C. Sodium hydride (60% in mineral oil; 8.2 g, 204 mmol) was added slowly, and the reaction was stirred at room temperature for 20 minutes, and then stirred at 105° C. for 4 hours. After cooling to room temperature, the mixture was worked-up with CH2Cl2 and aqueous NH4OH. The organic layer was concentrated, and the residue was purified by silica gel chromatography (0-20% EtOAc in hexanes) to give the title compound.

Provenance & Evidence