Iodine chloride → 4-(2-Fluoro-4-iodophenylamino)-1-(toluene-4-sulfonyl)-1H-indazole-5-carboxylic acid methyl ester

To a solution of 4-(2-fluoro-4-trimethylsilanylphenylamino)-1-(toluene-4-sulfonyl)-1H-indazole-5-carboxylic acid methyl ester (0.56 g, 1.1 mmol) in DCM (3 mL) at 0° C. was added a solution of iodine monochloride in DCM (2.2 mL, 1M, 2.2 mmol). The reaction mixture was stirred at 0° C. for 30 minutes. The reaction was quenched by the addition of water (10 mL) then diluted with saturated aqueous sodium thiosulfate solution (10 mL). The resultant mixture was extracted with ethyl acetate (3×20 mL) and the combined organic fractions washed with brine (20 mL), dried (MgSO4) then concentrated in vacuo. The resultant residue was subjected to flash chromatography (SiO2, gradient 0-100% DCM in cyclohexane) to yield the title compound as a light brown solid (0.51 g, 83%). LCMS (Method B): RT=4.87 min, [M+H]+=566.

1. customThe reaction was quenched by the addition of water (10 mL)
2. additionthen diluted with saturated aqueous sodium thiosulfate solution (10 mL)
3. extractionThe resultant mixture was extracted with ethyl acetate (3×20 mL)
4. washthe combined organic fractions washed with brine (20 mL)
5. dry with materialdried (MgSO4)
6. concentrationthen concentrated in vacuo

ORD-Eintrag

ord-4246e28526fd4a2daa3987a8eb8ce992

Quelldatensatz

uspto-grants-2014_09

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08841462B2