Methanesulfonic Acid → Ethyl 4-[(3-chlorophenyl)amino]-1-ethyl-1H-pyrrolo[3,2-c]pyridine-7-carboxylate

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Reaction Steps

A mixture of ethyl 4-chloro-1-ethyl-1H-pyrrolo[3,2-c]pyridine-7-carboxylate (0.095 g), 3-chloroaniline (0.079 ml) and methanesulfonic acid (0.049 ml) in 1,4-dioxan (2.5 ml) was irradiated at 180° C. for 30 minutes with microwaves. The residue was partitioned between ethyl acetate and water, the aqueous was separated, basified with an aqueous 2M sodium bicarbonate solution and extracted three times with ethyl acetate. The combined organic layers were washed with brine, dried (MgSO4), filtered and evaporated to afford the title compound as a brown oil (0.160 g).

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