Citric Acid → (2S)-3-(2-(tert-butyldiphenylsilyloxy)ethoxy)-2-(1-(2-chlorophenyl)-1H-pyrazolo[3,4-d]pyrimidin-4-yloxy)-N-(5-methylpyridin-2-yl)propanamide

HRID 1098188Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1098188
[H-].[Na+].[Si:3]([O:20][CH2:21][CH2:22][O:23][CH2:24][C@H:25]([OH:36])[C:26]([NH:28][C:29]1[CH:34]=[CH:33][C:32]([CH3:35])=[CH:31][N:30]=1)=[O:27])([C:16]([CH3:19])([CH3:18])[CH3:17])([C:10]1[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=1)[C:4]1[CH:9]=[CH:8][CH:7]=[CH:6][CH:5]=1.Cl[C:38]1[N:43]=[CH:42][N:41]=[C:40]2[N:44]([C:47]3[CH:52]=[CH:51][CH:50]=[CH:49][C:48]=3[Cl:53])[N:45]=[CH:46][C:39]=12.C(O)(=O)CC(CC(O)=O)(C(O)=O)O>C1COCC1>[Si:3]([O:20][CH2:21][CH2:22][O:23][CH2:24][C@H:25]([O:36][C:38]1[N:43]=[CH:42][N:41]=[C:40]2[N:44]([C:47]3[CH:52]=[CH:51][CH:50]=[CH:49][C:48]=3[Cl:53])[N:45]=[CH:46][C:39]=12)[C:26]([NH:28][C:29]1[CH:34]=[CH:33][C:32]([CH3:35])=[CH:31][N:30]=1)=[O:27])([C:16]([CH3:19])([CH3:18])[CH3:17])([C:10]1[CH:11]=[CH:12][CH:13]=[CH:14][CH:15]=1)[C:4]1[CH:5]=[CH:6][CH:7]=[CH:8][CH:9]=1

Komponenten

6

Edukt 4

HCID 311Citric AcidHCID 24758Sodium hydrideHCID 112655704-Chloro-1-(2-chlorophenyl)-1H-pyrazolo[3,4-D]pyrimidineHCID 57504665(S)-3-(2-(tert-butyldiphenylsilyloxy)ethoxy)-2-hydroxy-N-(5-methylpyridin-2-yl)propanamide

Produkt 1

HCID 57504542(2S)-3-(2-(tert-butyldiphenylsilyloxy)ethoxy)-2-(1-(2-chlorophenyl)-1H-pyrazolo[3,4-d]pyrimidin-4-yloxy)-N-(5-methylpyridin-2-yl)propanamideAusbeute 100 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

Sodium hydride (14.21 mg, 0.36 mmol) was added to (S)-3-(2-(tert-butyldiphenylsilyloxy)ethoxy)-2-hydroxy-N-(5-methylpyridin-2-yl)propanamide (Intermediate AU2) (85 mg, 0.18 mmol) in anhydrous THF (5 mL) at 0° C. under nitrogen. The resulting solution was stirred at 0° C. for 10 minutes and then 4-chloro-1-(2-chlorophenyl)-1H-pyrazolo[3,4-d]pyrimidine (47.1 mg, 0.18 mmol) was added. The reaction mixture was allowed to warm to room temperature and stirred for 1 hour. The reaction mixture was neutralised with 1M citric acid and the majority of the THF removed in vacuo. The reaction mixture was diluted with water (20 mL) and EtOAc (50 mL). The organic layer was separated and the aqueous layer re-extracted with EtOAc (2×20 mL). The combined organics were washed with saturated brine (10 mL), dried (MgSO4) and evaporated. The crude product was purified by flash silica chromatography, eluting with 0 to 20% EtOAc in isohexane to give (2S)-3-(2-(tert-butyldiphenylsilyloxy)ethoxy)-2-(1-(2-chlorophenyl)-1H-pyrazolo[3,4-d]pyrimidin-4-yloxy)-N-(5-methylpyridin-2-yl)propanamide (126 mg, 100%). 1H NMR (400 MHz, CDCl3) δ0.99 (s, 9H), 2.29 (s, 3H), 3.67-3.73 (m, 2H), 3.77-3.84 (m, 2H), 4.13-4.25 (m, 2H), 6.07 (t, 1H), 7.29-7.54 (m, 10H), 7.59-7.69 (m, 5H), 8.06-8.16 (m, 2H), 8.38 (s, 1H), 8.58 (s, 1H), 8.66 (s, 1H); m/z (ES+), (M+H)=707.62; HPLC tR=3.81 min

Aufarbeitung

  1. temperatureto warm to room temperature
  2. stirringstirred for 1 hour
  3. customthe majority of the THF removed in vacuo
  4. additionThe reaction mixture was diluted with water (20 mL) and EtOAc (50 mL)
  5. customThe organic layer was separated
  6. extractionthe aqueous layer re-extracted with EtOAc (2×20 mL)
  7. washThe combined organics were washed with saturated brine (10 mL)
  8. dry with materialdried (MgSO4)
  9. customevaporated
  10. customThe crude product was purified by flash silica chromatography
  11. washeluting with 0 to 20% EtOAc in isohexane

Quellen und Nachweise

ORD-Eintrag
ord-4425363d8e30410089bcaaccbdd3dc9e
Quelldatensatz
uspto-grants-2012_03
Patentnummer
US08143263B2

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