Reaktion #1115209

Reaktionsgleichung

(S)-6-(3-cyano-1-cyclobutyl-6-(difluoromethoxy)-5-fluoro-1H-indol-2-yl)-N-(1,1,1-trifluoropropan-2-yl)pyridine-3-sulfonamide

Br2

NaHSO3

→

(S)-6-(4-bromo-3-cyano-1-cyclobutyl-6 (difluoromethoxy)-5-fluoro-1H-indol-2-yl)-N-(1,1,1-trifluoropropan-2-yl)pyridine-3-sulfonamide

Ausbeute 46.3%

Lösungsmittel

1,2-dichloroethane

Reaktionsbedingungen

Aufarbeitung

1. 1
   ExtraktionThis was extracted into CH2Cl2
2. 2
   TrocknenThe organic layer was dried over MgSO4
3. 3
   Filtrationfiltered
4. 4
   Einengenthe filtrate was concentrated under vacuum
5. 5
   SonstigePurification by silica gel chromatography (ethyl acetate in hexanes, 20% to 30%)

Vorschrift

A mixture of (S)-6-(3-cyano-1-cyclobutyl-6-(difluoromethoxy)-5-fluoro-1H-indol-2-yl)-N-(1,1,1-trifluoropropan-2-yl)pyridine-3-sulfonamide (500 mg, 0.94 mmol), Fe powder (700 mg, 13 mmol), Br2 (300 μL, 5.9 mmol), and 1,2-dichloroethane (3 mL) was heated at 50° C. for 3 hours. The reaction mixture was then poured into aq. NaHSO3 solution. This was extracted into CH2Cl2. The organic layer was dried over MgSO4 and filtered, and the filtrate was concentrated under vacuum. Purification by silica gel chromatography (ethyl acetate in hexanes, 20% to 30%) yielded (S)-6-(4-bromo-3-cyano-1-cyclobutyl-6 (difluoromethoxy)-5-fluoro-1H-indol-2-yl)-N-(1,1,1-trifluoropropan-2-yl)pyridine-3-sulfonamide (266 mg, 46%) as a white solid.

Quelle