Diisopropylethylamine → 4-Isobutoxy-1h-indole-2-carboxylic acid {1-[2-(3-fluoro-piperidin-1-yl)-ethyl]-piperidin-4-yl}-amide

Participants

Reaction Conditions

Reaction Steps

To a suspension of 190 (see example 150) (100 mg, 0.28 mmol), 3-fluoropiperidine hydrochloride (43 mg, 0.208 mmol) and DIEA (0.189 ml, 1.12 mmol) in 0.5 ml of propionitrile is added cyanomethyl-triphenyl phosphonium iodide (81 mg, 0.336 mmol). The mixture is heated at 90° C. for 14 hours. The resulting solution is then diluted with EtOAc (20 ml) and washed twice with saturated sodium bicarbonate, dried over sodium sulfate and evaporated. The crude product is further purified by preparative HPLC.

Provenance & Evidence