反应详情

To a solution of (3S)-3-(N-t-butoxycarbonylamino)-5-methyl-2-hydroxyheptanoic acid methyl ester (4.40 g) in N,N-dimethylformamide (16 ml) was added methyl-2-propenyl ether (4.60 ml) and further was added dl-camphor sulfonic acid (186 mg) and the mixture was stirred overnight at room temperature. The residue was purified by column chromatography on silica gel (n-hexane:ethyl acetate=10:1 to 4:1) to give the title compound (3.90 g) having the following physical data.

1. customThe residue was purified by column chromatography on silica gel (n-hexane:ethyl acetate=10:1 to 4:1)