4-tert-Butylcatechol → Methyl 3-(2-Nitroethyl)-1H-indole-4-carboxylate

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A solution of methyl 1H-indole-4-carboxylate (7.34 g, 41.9 mmol), 2-nitroethyl acetate (6.90 g, 51.9 mmol) and 4-tert-butylcatechol (0.026 g, 0.16 mmol) in xylene (50 mL) was refluxed for 6 hrs. The solvent was evaporated under reduced pressure to give a residual dark oily raw product that was purified by short column chromatography on silica using ethyl acetate-light petroleum as eluent. The product was obtained as yellowish solid material in 79% yield. Mp: 103° C. MS m/z 249 [M+H]+.

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