Water → (2E,4S)-4-({[(1,1-dimethylethyl)oxy]carbonyl}amino)-2-hexenoic acid

LiOH (2.95 g, 123 mmol) was added to a solution of methyl (2E,4S)-4-({[(1,1-dimethylethyl)oxy]carbonyl}amino)-2-hexenoate (6 g, 24.66 mmol) in THF (50 mL), MeOH (10.00 mL), and water (50.0 mL). The reaction was stirred overnight at RT. After 18.5 h, the reaction mixture was concentrated under reduced pressure to remove the THF and MeOH. Water (40 mL) was added, and aqueous mixture was adjusted to pH=3 with 6 M aq. HCl, as measured by pH paper. EtOAc (80 mL) was added, the layers were separated, and the aqueous layer was extracted with EtOAc (2×40 mL). The combined organic layers were dried over Na2SO4, concentrated under reduced pressure, and dried under high vacuum, giving 6.09 g of the title compound. LC-MS m/z 230 (M+H)+, 0.77 min (ret time).

1. waitAfter 18.5 h
2. concentrationthe reaction mixture was concentrated under reduced pressure
3. customto remove the THF and MeOH
4. additionWater (40 mL) was added
5. additionEtOAc (80 mL) was added
6. customthe layers were separated
7. extractionthe aqueous layer was extracted with EtOAc (2×40 mL)
8. dry with materialThe combined organic layers were dried over Na2SO4
9. concentrationconcentrated under reduced pressure
10. customdried under high vacuum

ORD-Eintrag

ord-2f8c9416e27740be98b0442139d0d73c

Quelldatensatz

uspto-grants-2014_09

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08841463B2