Water → HCID 68798699, compound

Participants

Reaction Conditions

Reaction Steps

In an atmosphere of nitrogen, 4.85 g of (methoxymethyl)triphenylphosphonium chloride is suspended in 40 mL of tetrahydrofuran. Then, 1.5 mL of diisopropylamine is added to the suspension, and cooled to −60° C. After dropwise adding thereto 6.6 mL of 1.6 mol/L solution of n-butyllithium in hexane, the mixture thus obtained is stirred for 30 minutes at an ice-cooled temperature. Then, the reaction mixture is cooled to −60° C., a solution of 1.72 g of benzo[b]thiophene-4-carboaldehyde in 15 mL of tetrahydrofuran is dropwise added, and the resulting mixture is allowed to stand overnight at ambient temperature. The reaction mixture is introduced into a mixture of water and ethyl acetate, and the organic layer is separated. The organic layer is washed with saturated aqueous solution of sodium chloride and dried over anhydrous magnesium sulfate, the solvent is distilled off under reduced pressure, the residue is treated with diethyl ether, and the deposited crystal is filtered off. The solvent is distilled off from the filtrate under reduced pressure, and the residue thus obtained is purified by column chromatography (eluent: n-hexane:ethyl acetate=100:1 to 50:1) to obtain 1.04 g of 2-benzo[b]thiophen-4-yl-1-ethenyl methyl ether as an oily product.

Provenance & Evidence