Tert-Butylamine → (S)-[2-[(1,1-dimethylethyl)amino]-2-oxo-1-(phenylmethyl)ethyl]-carbamic acid 1,1-dimethylethyl ester

HRID 2230274

Reaktionsgleichung

Reaktionsgleichung von HRID 2230274
[C:1]([O:5][C:6]([NH:8][C@H:9]([C:25]([OH:27])=O)[CH2:10][C:11]1[CH:16]=[CH:15][C:14](OCC2C=CC=CC=2)=[CH:13][CH:12]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2].CCN(C(C)C)C(C)C.CN(C(ON1N=NC2C=CC=CC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.[C:61]([NH2:65])([CH3:64])([CH3:63])[CH3:62]>CN(C=O)C.CCOCC>[CH3:4][C:1]([O:5][C:6](=[O:7])[NH:8][C@@H:9]([CH2:10][C:11]1[CH:12]=[CH:13][CH:14]=[CH:15][CH:16]=1)[C:25]([NH:65][C:61]([CH3:64])([CH3:63])[CH3:62])=[O:27])([CH3:2])[CH3:3]

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 11809380(S)-[2-[(1,1-dimethylethyl)amino]-2-oxo-1-(phenylmethyl)ethyl]-carbamic acid 1,1-dimethylethyl esterAusbeute 153,7 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 3283Diethyl EtherLösungsmittelHCID 6228DimethylformamideLösungsmittel

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

A solution of N-(tert-Butyloxycarbonyl)-O-benzyl-L-tyrosine (Bachem, 2.00 g, 5.38 mmol) in 20 mL of DMF was cooled to 0C and treated with iPr2NEt (1.5 mL) followed by HBTU (2.04 g, 5.38 mmol). The resulting suspension was stirred for 30 minutes at 0° C. and then treated with tert-butylamine (0.48 g, 6.56 mmol). The reaction mixture was stirred for 1 hour at 0° C. and warmed to room temperature. The reaction mixture was poured into Et2O and washed sequentially with saturated aqueous NaHCO3 solution, and saturated aqueous NaCl solution. The organic phase was dried (MgSO4), filtered, and concentrated. The crude residue was purified by chromatography (silica gel, 3:1 heptane/ethyl acetate) to give the product (2.65 g).

Aufarbeitung

  1. stirringThe reaction mixture was stirred for 1 hour at 0° C.
  2. temperaturewarmed to room temperature
  3. washwashed sequentially with saturated aqueous NaHCO3 solution, and saturated aqueous NaCl solution
  4. dry with materialThe organic phase was dried (MgSO4)
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customThe crude residue was purified by chromatography (silica gel, 3:1 heptane/ethyl acetate)

Quellen und Nachweise

ORD-Eintrag
ord-62054830a605401f9c70966e633748bd
Quelldatensatz
uspto-grants-2002_07
Patentnummer
US06423689B1

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