Benzyl Bromide → (S)-2-amino-3-(3'-chloro-biphenyl-4-yl)-propionic acid benzyl ester

HRID 388871Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 388871
C(OC([NH:8][C@@H:9]([CH2:13][C:14]1[CH:19]=[CH:18][C:17]([C:20]2[CH:25]=[CH:24][CH:23]=[C:22]([Cl:26])[CH:21]=2)=[CH:16][CH:15]=1)[C:10]([OH:12])=[O:11])=O)(C)(C)C.[CH2:27](Br)[C:28]1[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=1.C([O-])(O)=O.[Na+]>CN(C=O)C.CCOC(C)=O>[CH2:27]([O:12][C:10](=[O:11])[C@@H:9]([NH2:8])[CH2:13][C:14]1[CH:15]=[CH:16][C:17]([C:20]2[CH:25]=[CH:24][CH:23]=[C:22]([Cl:26])[CH:21]=2)=[CH:18][CH:19]=1)[C:28]1[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=1

Komponenten

6

Edukt 3

HCID 7498Benzyl BromideHCID 516892Sodium BicarbonateHCID 58280562(S)-2-(Tert-butoxycarbonylamino)-3-(3'-chlorobiphenyl-4-yl)propanoic acid

Produkt 1

HCID 58280537(S)-2-amino-3-(3'-chloro-biphenyl-4-yl)-propionic acid benzyl esterAusbeute 89,3 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 6228DimethylformamideLösungsmittelHCID 8857Ethyl AcetateLösungsmittel

Versuchsvorschrift

To a solution of (S)-2-tert-butoxycarbonylamino-3-(3′-chloro-biphenyl-4-yl)-propionic acid (12.9 g, 34.3 mmol) in DMF (130 mL) were added benzyl bromide (8.16 mL, 68.6 mmol) and NaHCO3 (5.77 g, 68.6 mmol). After stirred at room temperature overnight, the reaction mixture was diluted with EtOAc. The mixture was washed with H2O and brine, dried over Na2SO4, and concentrated under reduced pressure. The obtained residue was treated with 4M HCl in dioxane (30 mL) and stirred for 2 hours. The reaction mixture was concentrated and the resulted residue was rinsed with iPr2O to give (S)-2-amino-3-(3′-chloro-biphenyl-4-yl)-propionic acid benzyl ester (11.2 g). 1H NMR (400 MHz, DMSO-d6) δ 3.14 (dd, 1H, J=7.7, 12.0 Hz), 3.27 (dd, 1H, J=5.9, 12.0 Hz), 4.38 (dd, 1H, J=5.9, 7.7 Hz), 5.15 (s, 2H), 7.23-7.27 (m, 2H), 7.30-7.34 (m, 5H), 7.42-7.45 (m, 1H), 7.51 (dd, 1H, J=7.6, 7.6 Hz), 7.61-7.66 (m, 3H), 7.69 (dd, 1H, J=1.8, 1.8 Hz), 8.64 (bs, 2H); MS: m/z (MH+) 366.

Aufarbeitung

  1. washThe mixture was washed with H2O and brine
  2. dry with materialdried over Na2SO4
  3. concentrationconcentrated under reduced pressure
  4. additionThe obtained residue was treated with 4M HCl in dioxane (30 mL)
  5. stirringstirred for 2 hours
  6. concentrationThe reaction mixture was concentrated
  7. washthe resulted residue was rinsed with iPr2O

Quellen und Nachweise

ORD-Eintrag
ord-65574beac96445c48d0ccc35920cff22
Quelldatensatz
uspto-grants-2013_02
Patentnummer
US08377978B2

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