Tert-Butylamine → (S)-[2-(4-benzyloxy-phenyl)-1-tert-butylcarbamoyl-ethyl]-carbamic acid tert-butyl ester

HRID 1276422Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1276422
[C:1]([NH:8][C@H:9]([C:25](O)=[O:26])[CH2:10][C:11]1[CH:16]=[CH:15][C:14]([O:17][CH2:18][C:19]2[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=2)=[CH:13][CH:12]=1)([O:3][C:4]([CH3:7])([CH3:6])[CH3:5])=[O:2].C(N(C(C)C)CC)(C)C.[C:37]([NH2:41])([CH3:40])([CH3:39])[CH3:38].CN(C(ON1N=NC2C=CC=CC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F>CN(C=O)C.CCOC(C)=O>[C:4]([O:3][C:1](=[O:2])[NH:8][C@H:9]([C:25](=[O:26])[NH:41][C:37]([CH3:40])([CH3:39])[CH3:38])[CH2:10][C:11]1[CH:12]=[CH:13][C:14]([O:17][CH2:18][C:19]2[CH:20]=[CH:21][CH:22]=[CH:23][CH:24]=2)=[CH:15][CH:16]=1)([CH3:5])([CH3:7])[CH3:6]

Komponenten

7

Edukt 4

HCID 6385Tert-ButylamineHCID 81531DiisopropylethylamineHCID 98763O-benzyl-N-((tert-butoxy)carbonyl)-L-tyrosineHCID 2733084Methanaminium, N-((1H-benzotriazol-1-yloxy)(dimethylamino)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)

Produkt 1

HCID 15517726(S)-[2-(4-benzyloxy-phenyl)-1-tert-butylcarbamoyl-ethyl]-carbamic acid tert-butyl esterAusbeute 96,1 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 6228DimethylformamideLösungsmittelHCID 8857Ethyl AcetateLösungsmittel

Versuchsvorschrift

N-Boc-O-Benzyl-tyrosine (20.0 g, 53.9 mmol) was dissolved in DMF (270 mL) and treated with diisopropylethylamine (19 mL, 108 mmol), tert-butylamine (5.7 mL. 53.9 mmol), and HBTU (13.9 g, 53.9 mmol). The reaction was stirred for 15 minutes and then diluted with EtOAc (1 L), washed with saturated bicarbonate solution (2×1 L) and brine (1 L), dried over Na2SO4 and concentrated to give 22.1 g (92%) of (S)-[2-(4-Benzyloxy-phenyl)-1-tert-butylcarbamoyl-ethyl]-carbamic acid tert-butyl ester.

Aufarbeitung

  1. washwashed with saturated bicarbonate solution (2×1 L) and brine (1 L)
  2. dry with materialdried over Na2SO4
  3. concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag
ord-c54fd9e41660439db1afd391318c318c
Quelldatensatz
uspto-grants-2000_12
Patentnummer
US06166052

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