Ethyl ketone → 6-(1-Ethyl-1-hydroxy-propyl)-benzo[b]thiophene-2-carboxylic acid ethyl ester

Participants

Reaction Steps

To a stirred solution of 6-iodo-benzo[b]thiophene-2-carboxylic acid ethyl ester (2.95 g, 8.88 mmol) in THF (60 mL) at −78° C. is added ethylmagnesium bromide (4.45 mL, 3.0 M). The reaction mixture is stirred for 15 min, and 3-pentanone (3.0 mL) is added. The mixture is allowed to warm to RT and stirred for 30 min. The reaction is quenched with HCl (15 mL, 1.0 M) and extracted with EtOAc (2×50 mL). The organic layer is dried over Na2SO4, concentrated, and purified by silica gel column chromatography to give the title compound (0.65 g, 25%).

Provenance & Evidence