Triphenylphosphine → 2-[2-(7-Chloro-6-nitro-2-oxo-3-thiophen-2-yl-1,2-dihydro-quinolin-4-yloxy)-ethyl]-piperidine-1-carboxylic acid tert-butyl ester

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Reaction Steps

To a solution of 7-chloro-4-hydroxy-6-nitro-3-thiophen-2-yl-1H-quinolin-2-one (50 mg in 2.5 mL of tetrahydrofuran) at 0° C. was added 44 mg of 2-(2-hydroxyethyl)-piperidine-1-carboxylic acid tert-butyl ester and 63 mg of triphenylphosphine followed by 0.04 mL of diethyl azodicarboxylate and the mixture warmed to room temperature. After 24 hours, the solvents were removed in vacuo and the residue purified by flash chromatography on silica gel (hexane:ethyl acetate, 90:10; then 80:20; then 60:40) to give the title compound (44 mg).

Provenance & Evidence