5-{[4-(tetrahydro-2H-pyran-2-yloxy)cyclohexyl]oxy}-1H-indazole → 4-(1H-indazol-5-yloxy)cyclohexanol

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Reaktionsschritte

An acidic resin (Dowex 50W×8, trade name, Dow Chemical Company, 46 mg) was added to a solution of 5-{[4-(tetrahydro-2H-pyran-2-yloxy)cyclohexyl]oxy}-1H-indazole (232 mg, 0.733 mmol) in methanol (10 ml), and the resulting mixture was heated to 50° C. After 5 hours, the reaction solution was filtered by the use of Celite and the filtrate was concentrated under reduced pressure. The resulting residue was purified by a silica gel column chromatography (eluent: chloroform/methanol) to obtain 4-(1H-indazol-5-yloxy)cyclohexanol (132 g, 78%).

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