1,3-Dibromopropane → HCID 69705675, compound

Participants

Reaction Conditions

Reaction Steps

1-{6-[1-(4-Fluoro-phenyl)-1H-indazol-5-yloxy]-pyridin-3-yl}-pyrrolidine-2,2-dicarboxylic acid diethyl ester is prepared by dissolving 2-{6-[1-(4-Fluoro-phenyl)-1H-indazol-5-yloxy]-pyridin-3-ylamino}-malonic acid diethyl ester (9.25 mmol) in dimethylformamide (90 mL), followed by addition of 1,3 dibromopropane (938 μL, 9.25 mmol) and cesium carbonate (6 grams, 18.5 mmol). The reaction mixture is stirred for approximately 24 hours to 48 hours. The mixture is filtered through celite, and then concentrated under vacuum while heating to 55° C. to remove the dimethylformamide (azeotroping with toluene). The crude product obtained is chromatographed on silica gel (ISCO MPLC purification, 40 minutes, 0-50% ethyl acetate gradient, Biotage flash 40m column) to provide the title compound.

Provenance & Evidence