Ethyl Acetate → HCID 54122061, compound

Participants

Reaction Steps

To a slurry of 202 mg(5.05 mmol) of 60% sodium hydride-mineral oil dispersion (pre-washed with penlane) in 3 mL of anhydrous N,N-dimethylformamide was added a solution of 0.77 g (3.81 mmol) of 7-hydroxy-8-(2-propenyl)-4H-1-benzopyran-4-one in 12 mL of anhydrous N,N-dimethylformamide, over a 1 min period. The mixture was stirred at room temperature for 15 min whereupon a solution of 2.1 g (4.29 mmol) of 2-(6-iodohexyl)-6-(4-methoxy-4-oxobutoxy)benzenepropanoic acid methyl ester (example 17) in 15 mL of anhydrous N,N-dimethylformamide was added over a 1 min period. The resulting mixture was stirred at room temperature for 3 hr before being treated with ice-water, and worked-up with ethyl acetate in the usual manner. The oily product was chromatographed on silica gel, eluting with hexane-ethyl acetate mixtures. There was obtained 1.7 g (79.1%) of the title compound as a yellow oil.

Provenance & Evidence