Potassium Carbonate → 6-chloro-1-(3,3,4,4,4-pentafluorobutyl)-1H-indazole-3-carbonitrile

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Reaction Steps

An acetonitrile solution (450 mL) containing the intermediate from Step C (30 g, 169 mmol), potassium carbonate (116.6 g, 844 mmol) and 1,1,1,2,2-pentafluoro-4-iodobutane (97.2 g, 354.7 mmol) was refluxed for 36 hours. The solution was cooled to room temperature and partitioned between EtOAc and water. The organic phase was concentrated and the crude material was filtered through a plug of silica gel using 10% EtOAc/heptanes as the eluent. The isolated material was subsequently recrystallized from heptanes to give the indicated product. 1H NMR (400 MHz, CH3 CN-d3): δ 7.87-7.80 (m, 2H); 7.40 (dd, J=8.7, 1.7 Hz, 1H); 4.77 (t, J=7.0 Hz, 2H); 2.95-2.78 (m, 2H). m/z=324.1 (M+H).

Provenance & Evidence