Ethanolamine → HCID 9976768, compound

Participants

Reaction Steps

1.1 cm3 of ethanolamine and then 1.50 g of potassium carbonate are added to 1.6 g of N-[6,7-difluoro-5-phenyl-1-[[2-(trimethylsilyl)ethoxy]methyl]-1H-indazol-3-yl]-butanamide described above, in 50 cm3 of dimethylformamide, and the mixture is refluxed for one week. The reaction medium is concentrated to dryness under reduced pressure and taken up in 150 cm3 of ethyl acetate and 75 cm3 of water. The organic phase is separated out after settling of the phases and washed successively with twice 75 cm3 of water and 50 cm3 of brine. The organic phase is dried over magnesium sulfate, filtered and then concentrated to dryness under reduced pressure (2 kPa; 50° C.). The crude oil obtained is purified by chromatography under an argon pressure of 50 kPa, on a column of silica gel (particle size 40–60 μm; diameter 4 cm), eluting with a cyclohexane/ethyl acetate mixture (80/20 by volume). The fractions containing the expected product are combined and evaporated under reduced pressure (2 kPa; 50° C.). After drying (90 Pa; 45° C.), 0.32 g of 6,7-difluoro-5-phenyl-1-[[2-(trimethylsilyl)ethoxy]methyl]-1H-indazole-3-amine is obtained.

Provenance & Evidence