1-Isopropylpiperazine → Ethyl 4-(2,4-difluoroanilino)-7-ethoxy-6-(4-propan-2-ylpiperazin-1-yl)quinoline-3-carboxylate

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To a solution of ethyl 6-bromo-4-(2,4-difluorophenylamino)-7-ethoxyquinoline-3-carboxylate (400 mg, 0.89 mmol) and 1-(Isopropyl)piperazine (254 µl, 1.77 mmol) in dioxane was added cesium carbonate (722 mg, 2.22 mmol), tris(dibenzylideneacetone)dipalladium(0) (40.6 mg, 0.04 mmol) and rac-2,2'-Bis(diphenylphosphino)-1,1'-binaphthyl (55.2 mg, 0.09 mmol). Reaction vessel in oil bath set to 110 °C. 11am After 5 hours, MS shows product (major peak 499), and SM (minor peak 453). o/n, MS shows product peak. Reaction cooled, concentrated onto silica, and purified on ISCO. 40g column, 1:1 EA:Hex, then 100% EA. 289mg yellow solid. NMR (EN00180-62-1) supports product, but some oxidised BINAP impurity (LCMS 655).

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