反应详情

Tert-butyl 4-{3-[(3R)-3-{[(1S)-1-(5-{2-[2-(2-fluoroethoxy)ethoxy]ethoxy}pyridin-3-yl)-3-methoxy-3-oxopropyl]carbamoyl}piperidin-1-yl]-3-oxopropyl}piperidine-1-carboxylate (16.5 mg, 22 μmol) as solved in tert.-butanol (0.62 mL) and methanol (0.6 mL) and barium hydroxide octahydrate (34 mg, 315 μmol) was added. After stirring for 45 minutes room temperature the solvent was distilled off at 0° C. by high vacuum. The residue was solved in water (0.3 mL) and acidified by formic acid (0.9 mL). After 18 hours at 5° C. the solvent was distilled off at 0° C. by high vacuum and the residue was purified by preparative HPLC to yield 1.6 mg of (3R)-3-(5-{2-[2-(2-fluoroethoxy)ethoxy]ethoxy}pyridin-3-yl)-3-[({(3S)-1-[3-(piperidin-4-yl)propanoyl]piperidin-3-yl}carbonyl)amino]propanoic acid.

1. distillationwas distilled off at 0° C. by high vacuum
2. distillationAfter 18 hours at 5° C. the solvent was distilled off at 0° C. by high vacuum
3. customthe residue was purified by preparative HPLC