Nitric Acid → Methyl 3-(4-nitrophenyl)cyclobutane-1-carboxylate

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Reaction Steps

Fuming nitric acid (0.54ml.) was added dropwise to a stirred solution of methyl 3-phenylcyclobutanecarboxylate (950mg.) in acetic anhydride (5ml.) and glacial acetic acid (0.25ml.) at -5° C. The reaction mixture was set aside overnight at room temperature then poured onto ice and extracted with ethyl acetate (3 × 20ml.). The ethyl acetate solution was dried over magnesium sulphate and evaporated under reduced pressure. Chromatography of the residue on a column of "Florisil" (25g.), eluting with toluene, gave methyl 3-(4-nitrophenyl)cyclobutanecarboxylate as a pale yellow oil. The n.m.r. spectrum in deuteriochloroform showed the following characteristic signals (δ values):

Provenance & Evidence