Citric Acid → HCID 24769674, compound

Participants

Reaction Steps

Under inert atmosphere to 166 mg 2-{[1-(2-hydroxy-ethoxy)-naphthalene-2-carbonyl]-amino}-2-methyl-propionic acid methyl ester, 74 mg indan-5-ol and 208 mg polystyrene-bound triphenyl phosphine (3 mmol/g) in 5 ml THF at 0° C. 98 μl diethylazodicarboxylate were added. After 16 h at room temperature the reaction was filtrated, the filtrate concentrated in vacuo and after RP-HPLC the obtained 2-({1-[2-(Indan-5-yloxy)-ethoxy]-naphthalene-2-carbonyl}-amino)-2-methyl-propionic acid methyl ester was dissolved in 3 ml of dioxane and reacted with 3 ml 1N NaOH for 5 h at 50° C. The reaction was then diluted with ethyl acetate and treated with citric acid (5%). The organic layer was separated, dried and concentrated in vacuo. After purification by RP-HPLC 22 mg 2-{[1-(2-hydroxy-ethoxy)-naphthalene-2-carbonyl]-amino}-2-methyl-propionic acid were obtained.

Provenance & Evidence