反应详情

5-{3-[(1S)-2-Methoxy-1-methylethoxy]-5-[(triisopropylsilyl)oxy]phenyl}-1H-pyrrole-2-carboxylic acid (9.32 g, 20.8 mmol) synthesized in Example (106c) was dissolved in methanol (200 mL), and (S)-(−)-3-amino-1,2-propanediol (5.01 g, 55.0 mmol) and 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholinium chloride n hydrate (10.13 g, 32.3 mmol) were added, followed by stirring at room temperature overnight under nitrogen atmosphere. The solvent was distilled off under reduced pressure, water (300 mL) and ethyl acetate (200 mL) were added to the resulting residue, and the solution was separated. The organic layer was washed with saturated brine, subsequently dried over anhydrous magnesium sulfate, and the solvent was distilled off under reduced pressure. The resulting residue was purified using silica gel column chromatography (elution solvent: ethyl acetate/hexane=70%-100%) to afford the desired product (9.32 g, yield 86%) as a colorless oil.

1. distillationThe solvent was distilled off under reduced pressure, water (300 mL) and ethyl acetate (200 mL)
2. additionwere added to the resulting residue
3. customthe solution was separated
4. washThe organic layer was washed with saturated brine
5. dry with materialsubsequently dried over anhydrous magnesium sulfate
6. distillationthe solvent was distilled off under reduced pressure
7. customThe resulting residue was purified
8. washsilica gel column chromatography (elution solvent: ethyl acetate/hexane=70%-100%)