4-Methylmorpholine → HCID 71249981, Verbindung

Temperatur

-15 °C

Compound 8 (5.0 g, 20.08 mmol) was dissolved in CH2Cl2 (50 mL), NMM (2.43 mL, 22.08 mmol) and IBCF (2.74 mL, 23.09 mmol) were added and stirred at −15° C. for 30 minutes under inert atmosphere. A mixture of (2S,3R)-methyl 2-amino-3-hydroxybutanoate (2.93 g, 22.08 mmol) and NMM (2.43 mL, 22.08 mmol) in DMF (15 mL) were added drop wise at −15° C. The resultant reaction mixture was stirred at RT for 3 h. It was diluted with DCM (200 mL) and the organic layer was washed with water (50 mL), brine (50 mL), dried over anhydrous Na2SO4 and concentrated under reduced pressure. The obtained crude was purified by silica gel column chromatography eluting with 30% EtOAc/Hexane to afford compound 9 (3.1 g, 42%).

1. additionwere added drop wise at −15° C
2. customThe resultant reaction mixture
3. stirringwas stirred at RT for 3 h
4. washthe organic layer was washed with water (50 mL), brine (50 mL)
5. dry with materialdried over anhydrous Na2SO4
6. concentrationconcentrated under reduced pressure
7. customThe obtained crude
8. customwas purified by silica gel column chromatography
9. washeluting with 30% EtOAc/Hexane

ORD-Eintrag

ord-3f8f29646a7c41eea55142c792c4cecf

Quelldatensatz

uspto-grants-2014_03

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08673843B2