Methanesulfonic Acid → 6-(3,5-dimethoxyphenyl)-3-iodo-1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazolo[4,3-b]pyridine

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Reaction Conditions

Reaction Steps

A mixture of 6-(3,5-dimethoxyphenyl)-3-iodo-1H-pyrazolo[4,3-b]pyridine (0.54 g, 1.4 μmmol), dihydropyran (0.39 mL, 4.2 mmol) and methanesulfonic acid (18 μL, 0.28 mmol) in methylene chloride (6 mL) and tetrahydrofuran (2 mL) in a sealed reaction vial was stirred at 50° C. for 3 h. After cooling it was concentrated under reduced pressure. The residue was purified by flash chromatography on a silica gel column with ethyl acetate in hexanes (0-50%) to afford the desired product (0.60 g). LCMS (M+H)+=465.9.

Provenance & Evidence