Chloroacetyl chloride → HCID 69597420, compound

Participants

Reaction Conditions

Reaction Steps

A solution of the product from Step H (22.0 g, 63.9 mmol) in ethyl acetate (150 mL) was vigorously stirred at 0° C. with saturated sodium bicarbonate (150 mL). Chloroacetyl chloride (5.6 mL, 70.2 mmol) was added dropwise, and the reaction stirred at 0° C. for 2 h. The layers were separated, and the ethyl acetate phase was washed with 10% citric acid and saturated brine, and dried over sodium sulfate. After concentration in vacuo, the resulting crude product (27.6 g) was dissolved in DMF (300 mL) and cooled to 0° C. under argon. Cesium carbonate (63.9 g, 196 mmol) was added, and the reaction was stirred for two days, allowing it to warm to room temperature. Another portion of cesium carbonate (10 g, 30 mmol) was added, and the reaction was stirred for 16 hours. The DMF was distilled in vacuo, and the residue partitioned between ethyl acetate and water. The organic phase was washed with saturated brine, and dried over sodium sulfate. The crude product was chromatographed on silica gel with 20-25% ethyl acetate in hexane to obtain the title compound.

Provenance & Evidence