Benzenecarboximidic acid, ethyl ester, hydrochloride (1:1) → Tert-butyl 4-(5-phenyl-1,3,4-oxadiazol-2-yl)piperidine-1-carboxylate

참여 물질

반응 단계

To a stirred solution of 4-hydrazinocarbonyl-piperidine-1-carboxylic acid tert-butyl ester (1.15 g, 4.73 mmol, 1.0 eq) in EtOH (15 mL) was added benzimidic acid ethyl ester hydrochloride (921 mg, 4.96 mmol, 1.05 eq.) and the reaction mixture was refluxed for 48 h. The inorganic precipitate was filtered off, washed with ethyl acetate, and the solvent of the mother liquor was evaporated in vacuo. The residue was purified by column chromatography (ethyl acetate/heptanes) to give the title compound as a white solid (327 mg, 0.99 mmol). MS (m/z, MH+): 330.2

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