Pyridine → (6-{3-[Bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-4-hydroxy-pyrrolidin-1-yl}-6-oxo-hexyl)-carbamic Acid Benzyl Ester

Referring to scheme 16, compound 63 (3.65 g, 10 mmol) was co-evaporated with anhydrous pyridine three times and then dissolved in pyridine (10 mL). To this solution dimethylamino pyridine (0.122 g, 1 mmol) and DMT-Cl (3.55 g, 10.5 mmol, 1.05 equiv.) were added at room temperature. The reaction mixture was stirred at room temperature for 16 h. The excess DMT-Cl was quenched by the addition of methanol (10 mL). The solution was dried under reduced pressure. To the residue was suspended in ethyl acetate (200 mL) and washed with saturated bicarbonate solution, brine and water. The organic layer was dried over anhydrous sodium sulfate, filtered and evaporated. The crude product was obtained after removal of the solvent. Upon purification over silica gel using 3% MeOH/DCM compound 64 (5.9 g, 88%) was obtained as white foamy solid.

1. customThe excess DMT-Cl was quenched by the addition of methanol (10 mL)
2. customThe solution was dried under reduced pressure
3. washwashed with saturated bicarbonate solution, brine and water
4. dry with materialThe organic layer was dried over anhydrous sodium sulfate
5. filtrationfiltered
6. customevaporated

ORD-Eintrag

ord-1aebe1de26e1444280aa66ea5b144319

Quelldatensatz

uspto-grants-2010_06

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07745608B2