Imidazole → (2R,3S)-3-(tert-Butyldimethylsilyloxy)-2-(3-chloro-4-cyano-2-methylphenylamino)-N-(2-oxo-2-phenylethyl)butanamide

HRID 2388446Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2388446
[Cl:1][C:2]1[C:3]([CH3:27])=[C:4]([NH:10][C@H:11]([C@@H:24]([OH:26])[CH3:25])[C:12]([NH:14][CH2:15][C:16](=[O:23])[C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)=[O:13])[CH:5]=[CH:6][C:7]=1[C:8]#[N:9].CN(C=O)C.N1C=CN=C1.[C:38]([Si:42](Cl)([CH3:44])[CH3:43])([CH3:41])([CH3:40])[CH3:39]>CCOC(C)=O.O>[Si:42]([O:26][C@@H:24]([CH3:25])[C@@H:11]([NH:10][C:4]1[CH:5]=[CH:6][C:7]([C:8]#[N:9])=[C:2]([Cl:1])[C:3]=1[CH3:27])[C:12]([NH:14][CH2:15][C:16](=[O:23])[C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1)=[O:13])([C:38]([CH3:41])([CH3:40])[CH3:39])([CH3:44])[CH3:43]

Komponenten

7

Edukt 4

HCID 795ImidazoleHCID 6228DimethylformamideHCID 28928tert-Butyldimethylsilyl chlorideHCID 57908663(2R,3S)-2-(3-Chloro-4-cyano-2-methylphenylamino)-3-hydroxy-N-(2-oxo-2-phenylethyl)butanamide

Produkt 1

HCID 57908587(2R,3S)-3-(tert-Butyldimethylsilyloxy)-2-(3-chloro-4-cyano-2-methylphenylamino)-N-(2-oxo-2-phenylethyl)butanamideAusbeute 80,4 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 8857Ethyl AcetateLösungsmittel

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

A 500 mL round bottomed flask was charged with (2R,3S)-2-(3-chloro-4-cyano-2-methylphenylamino)-3-hydroxy-N-(2-oxo-2-phenylethyl)butanamide (7.87 g, 20.4 mmol) and DMF (200 mL) then cooled to 0° C. Imidazole (6.94 g, 102 mmol) and tert-butylchlorodimethylsilane (9.22 g, 61.2 mmol) were added and the mixture was stirred and warmed to room temperature overnight. Water (200 mL) was added to the mixture followed by EtOAc (200 mL) and the phases partitioned. The organic phase was washed with water (2×100 mL), brine (100 mL), dried (Na2SO4) and concentrated to furnish the title compound as a white solid (8.2 g, 80%). 1H NMR (500 MHz, acetone-d6, δ in ppm) 7.97 (d, J=8 Hz, 2H), 7.44-7.66 (m, 1H), 7.40 (d, J=8 Hz, 1H), 6.42 (d, J=8 Hz, 1H), 5.43 (d, J=6 Hz, 1H), 4.77 (dd, J=6, 8 Hz, 2H), 4.79 (dd, J=5, 15 Hz, 2H), 4.70 (d, J=5, 15 Hz, 1H), 4.52-4.58 (m, 1H), 3.85-4.89 (m, 1H), 2.39 (s, 3H), 1.24 (d, J=6 Hz, 3H).

Aufarbeitung

  1. temperaturewarmed to room temperature overnight
  2. customthe phases partitioned
  3. washThe organic phase was washed with water (2×100 mL), brine (100 mL)
  4. dry with materialdried (Na2SO4)
  5. concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag
ord-3cc364bc25e342e78ea66c75d6de76ba
Quelldatensatz
uspto-grants-2012_09
Patentnummer
US08268872B2

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