HCID 19774074, compound → HCID 54145545, compound

Participants

Reaction Steps

To a stirred and ice-cooled solution of 6 (6.16 g, 29.9 mmol) in diethyl ether (60 mL) was added a solution of methylmagnesium bromide (3.0M solution in diethyl ether, 12 mL) dropwise over 10 min under nitrogen. The mixture was stirred for 20 min. The reaction was quenched by an addition of ammonium chloride solution and the organic layer was separated. The aqueous layer was extracted with diethyl ether and the combined organic layers were washed with brine, and dried over sodium sulfate. Filtration and concentration gave 5.80 g of an oily material, which was purified by column chromatography (silica gel 60 g, 4-10% ethyl acetate in n-hexane) to give 4.83 g (71.2%) of 7, as a colorless oil.

Provenance & Evidence