Dimethylformamide → N1-Cyclopropyl-5-[(2-{[4-(4-hydroxypiperidino)butanoyl]amino}-4-pyridyl)oxy]-1H-1-indolecarboxamide

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Reaction Steps

Phenyl N-cyclopropylcarbamate (120 mg) was added to a solution of 260 mg of 5-[(2-{[4-(4-hydroxypiperidino)butanoyl]amino}-4-pyridyl)oxy]indole, 53 mg of sodium hydride (60% in oil) and 5 ml of dimethylformamide while stirring at room temperature. After stirring for 10 minutes, water was added and extraction was performed with ethyl acetate. NH type silica gel was added to the ethyl acetate layer, the solvent was distilled off under reduced pressure and the reaction product was adsorbed onto the silica gel. The silica gel was charged into a dry column packed with NH type silica gel, and purification was performed by column chromatography (chloroform:methanol=30:1). The solvent was distilled off under reduced pressure, and the residue was dissolved in ethyl acetate and washed twice with 1N aqueous sodium hydroxide. After drying over sodium sulfate, the solvent was distilled off under reduced pressure to obtain 20 mg of the target substance as a white powder.

Provenance & Evidence