反应详情

A mixture of N-benzyloxycarbonyl-3(S)-hydroxymethyl -β-alanine tert-butyl ester (2.0 g), triphenylphosphine (1.87 g), imidazole (0.66 g) and I2 (1-80 g) was stirred for 30 minutes at room temperature. The precipitate was filtered off and the filtrate was evaporated in vacuo. The residue was purified by column chromatography on silica gel eluting with 5% (EtOAc/n-hexane) to give N-benzyloxycarbonyl-3(S)-iodomethyl-β-alanine tert-butyl ester (1.8 g) as a white solid.

1. filtrationThe precipitate was filtered off
2. customthe filtrate was evaporated in vacuo
3. customThe residue was purified by column chromatography on silica gel eluting with 5% (EtOAc/n-hexane)