反应详情

To a solution of (S)-methyl 5-(tert-butoxycarbonyl(methyl)amino)-6-hydroxyhexanoate (4.4 g, 16 mmol) in DCM (50 mL) was added CDI (3.1 g, 19 mmol). The reaction was complete in 30 min. DCM was removed. The residue was purified on silica gel column (hexanes/EtOAc 1:1) to give (S)-2-(tert-butoxycarbonyl(methyl)amino)-6-methoxy-6-oxohexyl 1H-imidazole-1-carboxylate (5.1 g, 85%) as a colorless oil. LRMS (M+Na+) m/z 392.1

1. customDCM was removed
2. customThe residue was purified on silica gel column (hexanes/EtOAc 1:1)