HCID 11983701, compound → HCID 11984190, compound

Participants

Reaction Steps

Finally, a solution of (R)-4-(di-tert-butoxy-phosphoryloxymethyl)-4-(2-{4-[2-(3-fluoro-phenoxy)-ethoxy]-phenyl}-ethyl)-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester (70 mg, 0.10 mmol) in conc. HCl (2 ml). is stirred at room temperature for one hour and is then heated to 95° C. for 2 hours, then concentrated to dryness. The residue is re-dissolved in ethyl acetate and precipitated with hexanes. The solid is filtered off, washed with dry ether and dried in vacuo to afford phosphoric acid mono-((R)-2-amino-4-{4-[2-(3-fluoro-phenoxy)-ethoxy]-phenyl}-2-hydroxymethyl-butyl)ester as a colorless powder.

Provenance & Evidence