p-Toluenesulfonic acid → HCID 71238321, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 6-(2-ethyl-5-fluoro-4-methoxy-phenyl)-3-iodo-1H-indazole (Preparation 16, 1.94 g, 4.9 mmol) in DCM (10 mL) was added p-TsOH (187 mg, 982 μmol) and the mixture was cooled to 0° C. 3,4-Dihydro-2H-pyran (660 μL, 7.4 mmol) was added dropwise to the solution and the reaction was stirred at room temperature overnight. The reaction mixture was diluted with DCM (5 mL) and washed with saturated sodium hydrogen carbonate aqueous solution (20 mL). The organic layer was dried over MgSO4 and concentrated in vacuo to yield a black oil. The residue was purified by column chromatography (Biotage SNAP 10 g) eluting with a gradient of 20% EtOAc in heptane to give the title compound as a colourless oil (2.09 g) in an 89% yield.

Provenance & Evidence