4-Methylmorpholine → HCID 10223115, Verbindung

A solution of (3R)-6-cyclohexyl-3-(3-{[3-(dimethylamino)-1-azetidinyl]carbonyl}-1,2,4-oxadiazol-5-yl)hexanoic acid (Preparation 76) (200 mg, 0.51 mmol) and N-methylmorpholine (112 μl, 1.00 mmol) in anhydrous tetrahydrofuran (15 ml) was cooled to 0° C., treated with isobutyl chloroformate (79 μl, 0.69 mmol) and stirred under a nitrogen atmosphere for 2 hours. O-(Trimethylsilyl)hydroxylamine (85 μl, 0.61 mmol) was added and the mixture was stirred for 18 hours, being allowed to warm to room temperature over this time. The mixture was then treated with methanol and stirred at room temperature for 2 hours. The solvent was removed under reduced pressure. The residue was dissolved in ethyl acetate (100 ml) and washed with water (2×25 ml) and brine (25 ml), dried over anhydrous sodium sulphate, filtered and the solvent removed under reduced pressure to afford the title compound as a foam (180 mg).

1. stirringthe mixture was stirred for 18 hours
2. stirringstirred at room temperature for 2 hours
3. customThe solvent was removed under reduced pressure
4. dissolutionThe residue was dissolved in ethyl acetate (100 ml)
5. washwashed with water (2×25 ml) and brine (25 ml)
6. dry with materialdried over anhydrous sodium sulphate
7. filtrationfiltered
8. customthe solvent removed under reduced pressure

ORD-Eintrag

ord-29e6ea4353044effae49bd04aba2113c

Quelldatensatz

uspto-grants-2002_09

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US06448278B2