Triphenylphosphine → 2-{2-[3-(3-Bromophenyl)-7-chloro-6-nitro-2-oxo-1,2-dihydroquinolin-4-yloxy]-ethyl}-piperidine-1-carboxylic acid tert-butyl ester

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Reaction Steps

To a solution of 3-(3-bromophenyl)-7-chloro-4-hydroxy-6-nitro-1H-quinolin-2-one (100 mg in 4.0 mL of tetrahydrofuran) at 0° C. was added 64 mg of 2-(2-hydroxyethyl)-piperidine-1-carboxylic acid tert-butyl ester and 93 mg of triphenylphosphine followed by 0.050 mL of diethyl azodicarboxylate and the mixture warmed to room temperature. After 20 hours, the solvents were removed in vacuo and the residue purified by flash chromatography on silica gel (hexane:ethylacetate, 2:1) to give the title compound (92 mg).

Provenance & Evidence