反应详情

A solution of tert-butyl (3S)-3-methylpiperazinecarboxylate (3 g, 15 mmol) and 2-(2R)-methyl-5-(oxiran-2-ylmethoxy)benzothiazole, (3.3 g, 15 mmol), a compound of formula (5), was refluxed in ethanol for 24 hours. The solvent was removed under reduced pressure, and the residue was chromatographed on silica gel, eluting with methanol/dichloromethane 1/15, to yield tert-butyl (3S)-4-[(2S)-2-hydroxy-3-(2-methylbenzothiazol-5-yloxy)propyl]-3-methylpiperazinecarboxylate, a compound of formula (8).

1. customThe solvent was removed under reduced pressure
2. customthe residue was chromatographed on silica gel
3. washeluting with methanol/dichloromethane 1/15