Citric Acid → HCID 90060310, compound

Participants

Reaction Conditions

Reaction Steps

tert-Butyl (E)-(2S,3S)-2-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-3-[(S)-2-(4-but-2-ynyloxy-phenyl)-1-ethoxycarbonyl-ethylcarbamoyl]-11-(2-heptyl-[1,3]dioxolan-2-yl)-2-hydroxy-undec-4-enoate (3.92 g, 4.49 mmol) was dissolved in acetonitrile (43 mL), and an aqueous solution of 0.5 M citric acid (19 mL, 9.50 mmol) was then added. The mixture was then stirred at 60° C. for 2.5 hours. The reaction solution was cooled to room temperature, and a mixture of a saturated aqueous solution (3.0 mL) of sodium chloride and water (60 mL) was then added. The solution was extracted three times with 20% ethyl acetate/n-hexane (32 mL). The organic layers were combined, then washed twice with a saturated aqueous solution (32 mL) of sodium chloride, dried over anhydrous sodium sulfate, and filtered. The solvent was then distilled off under reduced pressure to obtain 3.24 g (4.54 mmol, quant) of No. 5328627.

Provenance & Evidence