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4-Methylmorpholine → tert-butyl N-[(benzyloxy)carbonyl]glycyl-D-valinate

HRID 254072
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 254072
[CH2:1]([O:8][C:9]([NH:11][CH2:12][C:13]([OH:15])=O)=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.Cl.[NH2:17][C@@H:18]([C:22]([O:24][C:25]([CH3:28])([CH3:27])[CH3:26])=[O:23])[CH:19]([CH3:21])[CH3:20].CN1CCOCC1.CN(C(ON1N=NC2C=CC=CC1=2)=[N+](C)C)C.[B-](F)(F)(F)F>C(Cl)Cl>[CH2:1]([O:8][C:9]([NH:11][CH2:12][C:13]([NH:17][C@@H:18]([C:22]([O:24][C:25]([CH3:27])([CH3:26])[CH3:28])=[O:23])[CH:19]([CH3:21])[CH3:20])=[O:15])=[O:10])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1
KomponentenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

6

Edukt 4

HCID 79724-MethylmorpholineHCID 14349BenzyloxycarbonylglycineHCID 2733207O-(Benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborateHCID 45108216H-D-Val-OtBu hydrochloride

Produkt 1

HCID 66843039tert-butyl N-[(benzyloxy)carbonyl]glycyl-D-valinateAusbeute 94,4 %

Reagenzien, Katalysatoren, Lösungsmittel

1
HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

A mixture of N-[(benzyloxy)carbonyl]glycine (, 2.4 g, 11.5 mmol), tert-butyl D-valinate hydrochloride (2.4 g, 11.4 mmol) and N-methylmorpholine (2.53 ml, 22.9 mmol) in DCM (20 ml) was stirred at room temperature. TBTU (4.79 g, 14.9 mmol) was added and the mixture was stirred for three days. The solvent was removed under reduced pressure. Water was added and the mixture was extracted two times with toluen. The organic layer was washed with brine, dried (Na2SO4), filtered and concentrated. The crude product was purified by flash chromatography using DCM:EtOAc:aceton 4:1:1 as eluent to give 3.92 g (94%) of the title compound. NMR (500 MHz, CD3COOD) 0.88-0.99 (m, 6H), 1.48 (s, 9H), 2.08-2.19 (m 1H), 3.85 (ABq, 2H), 4.24 (d, 1H), 5.12 (ABq, 2H), 7.28-7.41 (m, 5H).

Aufarbeitung

  1. stirringthe mixture was stirred for three days
  2. customThe solvent was removed under reduced pressure
  3. additionWater was added
  4. extractionthe mixture was extracted two times with toluen
  5. washThe organic layer was washed with brine
  6. dry with materialdried (Na2SO4)
  7. filtrationfiltered
  8. concentrationconcentrated
  9. customThe crude product was purified by flash chromatography

Quellen und Nachweise

ORD-Eintrag
ord-c814377aca664cdea24e72fa1be9570a
Quelldatensatz
uspto-grants-2011_01
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US07871998B2

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