Ethyl 4-(piperazin-1-yl)benzoate → 4-{4-[5-(1-Ethyl-1H-indol-6-ylcarbamoyl)-pyridin-2-yl]piperazin-1-yl}-benzoic acid ethyl ester

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4-{4-[5-(1-Ethyl-1H-indol-6-ylcarbamoyl)-pyridin-2-yl]piperazin-1-yl}-benzoic acid ethyl ester was prepared from 6-chloro-N-(1-ethyl-1H-indol-6-yl)-nicotinamide and 4-(piperazin-1-yl)-benzoic acid ethyl ester following a method similar to the one described in the synthesis of 4-{4-[5-(3-iodo-4-methyl-phenylcarbamoyl)-pyridin-2-yl]-piperazin-1-yl}-benzoic acid ethyl ester above. The product was isolated after silica gel column chromatography with 20-50% EtOAc in hexanes gradient. HRMS m/z calcd for C29H31N5O3 [M+H]+: 498.2500. Found: 498.2501.

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