Methyl iodide → 6-Bromo-3-methoxy-1-phenyl-1H-indazole

Temperatur

80 °C

Into a 100-mL 3-necked round-bottom flask purged and maintained with an inert atmosphere of nitrogen, was placed a solution of 6-bromo-1-phenyl-1,2-dihydroindazol-3-one (5 g, 17.30 mmol, 1.00 equiv) in N,N-dimethylformamide (50 mL), potassium carbonate (3.7 g, 34.91 mmol, 2.00 equiv), CH3I (2.7 g, 19.01 mmol, 1.10 equiv). The resulting solution was stirred for 3 h at 80° C. in an oil bath. The reaction was then quenched by the addition of water (100 mL). The resulting solution was extracted with ethyl acetate (3×150 mL) and the organic layers combined, dried over anhydrous sodium sulfate and concentrated under vacuum. The residue was applied onto a silica gel column with ethyl acetate/petroleum ether (1:40) to yield 6-bromo-3-methoxy-1-phenyl-1H-indazole as a yellow solid.

1. customInto a 100-mL 3-necked round-bottom flask purged
2. temperaturemaintained with an inert atmosphere of nitrogen
3. customThe reaction was then quenched by the addition of water (100 mL)
4. extractionThe resulting solution was extracted with ethyl acetate (3×150 mL)
5. dry with materialdried over anhydrous sodium sulfate
6. concentrationconcentrated under vacuum

ORD-Eintrag

ord-ff37fbe0da8c47dbbbc08727f09a4bd9

Quelldatensatz

uspto-grants-2014_09

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08822447B2