3-Amino-1,2-propanediol, (S)- → HCID 66681785, compound

Participants

Reaction Steps

5-(3-[(1S)-2-Methoxy-1-methylethoxy]-5-{[5-(methylsulfonyl)pyrazin-2-yl]oxy}phenyl)-1H-pyrrole-2-carboxylic acid (1.07 g, 2.39 mmol) synthesized in Example (97e) was dissolved in methylene chloride (20 mL), and WSCI•HCl (732 mg, 3.82 mmol), (S)-(−)-3-amino-1,2-propanediol (500 mg, 5.49 mmol) and 4-dimethylaminopyridine (146 mg, 1.19 mmol) were added at room temperature, followed by stirring for 25 hours under nitrogen atmosphere. The reaction solution was diluted with ethyl acetate (50 mL), washed with a saturated aqueous sodium hydrogencarbonate solution and saturated brine, and subsequently dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure, and the resulting residue was purified using silica gel column chromatography (elution solvent: methanol/methylene chloride=0%-5%) to afford the desired product (666 mg, 54%) as a white solid.

Provenance & Evidence