Reaktion #67164

Reaktionsgleichung

sodium hydroxide

6-Bromo-4-(5-{[(3R,5S)-3,5-dimethyl-4-(1-methylethyl)-1-piperazinyl]methyl}-1,3,4-oxadiazol-2-yl)-1-(phenylsulfonyl)-1H-indazole

2,4-difluoro-N-[2-(methyloxy)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3-pyridinyl]benzenesulfonamide

potassium phosphate tribasic

→

title compound

Ausbeute 2.5%

N-[5-[4-(5-{[(3R,5S)-3,5-Dimethyl-4-(1-methylethyl)-1-piperazinyl]methyl}-1,3,4-oxadiazol-2-yl)-1H-indazol-6-yl]-2-(methyloxy)-3-pyridinyl]-2,4-difluorobenzenesulfonamide

Ausbeute 2.5%

Lösungsmittel

water

1,4-dioxane

Reaktionsbedingungen

Aufarbeitung

1. 1
   Waschenwashing with MeOH
2. 2
   SonstigeThe solvent was removed under a stream of nitrogen
3. 3
   Sonstigethe residue was partitioned between DCM (10 ml) and water (10 ml)
4. 4
   Sonstigeseparated with a hydrophobic frit
5. 5
   Sonstigethe solvent again removed under a stream of nitrogen
6. 6
   workup.DISSOLUTIONThe protected compound was dissolved in 1,4-dioxane (1 ml)
7. 7
   SonstigeThe mixture was evaporated to dryness under a stream of nitrogen
8. 8
   SonstigeThe residue was partitioned between ethyl acetate (5 ml) and saturated ammonium chloride (2 ml)
9. 9
   Sonstigeseparated with a hydrophilic frit
10. 10
    SonstigeThe solvent was removed under a stream of nitrogen
11. 11
    workup.DISSOLUTIONthe residue was dissolved in DMSO (1 ml)
12. 12
    Sonstigepurified
13. 13
    Sonstigeby purified by Mass Directed Automated Preparative HPLC

Vorschrift

6-Bromo-4-(5-{[(3R,5S)-3,5-dimethyl-4-(1-methylethyl)-1-piperazinyl]methyl}-1,3,4-oxadiazol-2-yl)-1-(phenylsulfonyl)-1H-indazole (172 mg, 0.300 mmol), 2,4-difluoro-N-[2-(methyloxy)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3-pyridinyl]benzenesulfonamide (128 mg, 0.300 mmol), 1,1′-bis(diphenylphosphino)ferrocene palladium dichloride (43.9 mg, 0.060 mmol) and potassium phosphate tribasic (191 mg, 0.900 mmol) were added to a microwave vial and dissolved in 1,4-dioxane (2.5 ml) and water (0.25 ml). The mixture was heated under microwave irradiation at 100° C. for 20 mins. The mixture was passed through a 1 g silica SPE cartridge, washing with MeOH. The solvent was removed under a stream of nitrogen and the residue was partitioned between DCM (10 ml) and water (10 ml), separated with a hydrophobic frit and the solvent again removed under a stream of nitrogen. The protected compound was dissolved in 1,4-dioxane (1 ml) and sodium hydroxide (1 ml, 2.000 mmol) and stirred at room temperature for 4 h. The mixture was evaporated to dryness under a stream of nitrogen. The residue was partitioned between ethyl acetate (5 ml) and saturated ammonium chloride (2 ml) and separated with a hydrophilic frit. The solvent was removed under a stream of nitrogen and the residue was dissolved in DMSO (1 ml) and purified by purified by Mass Directed Automated Preparative HPLC. The appropriate fraction was blown down under a stream of nitrogen to give the title compound as a pale yellow solid (4.9 mg).

Quelle