Potassium Carbonate → HCID 23442300, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 1,7-dimethyl-1,4-dihydro-9H-pyrazolo[4,3-b]quinolin-9-one (EXAMPLE 47, step 2, 0.1 g, 0.47 mmol), tert-butyl 4-[(methylsulfonyl)oxy]-1-piperidinecarboxylate ((Leeson et al., Bioorg. Med. Chem. Lett., 1999, 9, 1285), 0.66 g, 2.4 mmol) and potassium carbonate (0.13 g, 0.94 mmol) in dimethylsulfoxide (15 ml) was heated at 85° C. for 46.5 h. The reaction mixture was diluted with toluene/ethyl acetate (1:3, 30 ml), washed with water (30 ml), and dried over sodium sulfate. Removal of solvent gave a residue, which was chromatographed on a column of silica gel eluting with ethyl acetate/hexane (1:1) to afford 49 mg (26%) of the title compound as a pale brown solid.

Provenance & Evidence