Lithium Hexamethyldisilazide → (2S)-2-[1-(3-chloropyridin-2-yl)pyrazolo[4,5-e]pyrimidin-4-yl]oxy-3-ethoxy-N-(5-methylpyrazin-2-yl)propanamide

HRID 1097991Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1097991
C[Si]([N-][Si](C)(C)C)(C)C.[Li+].[CH2:11]([O:13][CH2:14][C@H:15]([OH:26])[C:16]([NH:18][C:19]1[CH:24]=[N:23][C:22]([CH3:25])=[CH:21][N:20]=1)=[O:17])[CH3:12].Cl[C:28]1[N:33]=[CH:32][N:31]=[C:30]2[N:34]([C:37]3[C:42]([Cl:43])=[CH:41][CH:40]=[CH:39][N:38]=3)[N:35]=[CH:36][C:29]=12>C1COCC1.CCOC(C)=O>[Cl:43][C:42]1[C:37]([N:34]2[C:30]3[N:31]=[CH:32][N:33]=[C:28]([O:26][C@@H:15]([CH2:14][O:13][CH2:11][CH3:12])[C:16]([NH:18][C:19]4[CH:24]=[N:23][C:22]([CH3:25])=[CH:21][N:20]=4)=[O:17])[C:29]=3[CH:36]=[N:35]2)=[N:38][CH:39]=[CH:40][CH:41]=1

Komponenten

6

Edukt 3

HCID 2733832Lithium HexamethyldisilazideHCID 575044824-Chloro-1-(3-chloropyridin-2-YL)-1H-pyrazolo[3,4-D]pyrimidine2×HCID 57504485(S)-3-ethoxy-2-hydroxy-N-(5-methylpyrazin-2-yl)propanamide

Produkt 1

HCID 57504327(2S)-2-[1-(3-chloropyridin-2-yl)pyrazolo[4,5-e]pyrimidin-4-yl]oxy-3-ethoxy-N-(5-methylpyrazin-2-yl)propanamideAusbeute 52 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 8028TetrahydrofuranLösungsmittel2×HCID 8857Ethyl AcetateLösungsmittel

Versuchsvorschrift

A solution of lithium bis(trimethylsilyl)amide (1.40 mL, 1.40 mmol) was added dropwise to a stirred solution of (S)-3-ethoxy-2-hydroxy-N-(5-methylpyrazin-2-yl)propanamide (Intermediate H1) (315 mg, 1.40 mmol) in THF (15 mL) over a period of 3 minutes under nitrogen. The resulting suspension was stirred at ambient temperature for 10 minutes and then a solution of 4-chloro-1-(3-chloropyridin-2-yl)-1H-pyrazolo[3,4-d]pyrimidine (Intermediate B15) (372 mg, 1.40 mmol) in anhydrous THF (3 mL) added dropwise over 1 minute and the reaction heated to 50° C. for 3 hours. The reaction mixture was diluted with EtOAc (50 mL), and washed sequentially with water (2×25 mL) and saturated brine (25 mL). The organic layer was dried (MgSO4) and evaporated. The residue was purified by flash silica chromatography eluting with EtOAc to afford (2S)-2-[1-(3-chloropyridin-2-yl)pyrazolo[4,5-e]pyrimidin-4-yl]oxy-3-ethoxy-N-(5-methylpyrazin-2-yl)propanamide (330 mg, 52%). 1H NMR (400 MHz, CDCl3) δ 1.24 (3H, t), 2.54 (3H, s), 3.60-3.68 (2H, m), 4.07-4.16 (2H, m), 6.09 (1H, t), 7.47 (1H, dd), 8.01 (1H, dd), 8.12 (1H, d), 8.47 (1H, s), 8.62 (1H, dd), 8.64 (1H, s), 8.66 (1H, s), 9.44 (1H, d); m/z (ESI+) (M+H)+=455; HPLC tR=1.77 min.

Aufarbeitung

  1. temperaturethe reaction heated to 50° C. for 3 hours
  2. washwashed sequentially with water (2×25 mL) and saturated brine (25 mL)
  3. dry with materialThe organic layer was dried (MgSO4)
  4. customevaporated
  5. customThe residue was purified by flash silica chromatography
  6. washeluting with EtOAc

Quellen und Nachweise

ORD-Eintrag
ord-13ab5d126f2c4550bc7b04957492aa4d
Quelldatensatz
uspto-grants-2012_03
Patentnummer
US08143263B2

Notizen zur Reaktion

Wird geladen…