Diisopropylethylamine → 2-{2-[7-Chloro-3-(3,5-dimethylphenyl)-6-nitro-2-oxo-1,2-dihydro-quinolin-4-yloxy]-ethyl}-piperidine-1-carboxylic acid 2-trimethylsilanylethyl ester

Participants

Reaction Steps

To a solution of 7-chloro-3-(3,5-dimethylphenyl)-6-nitro-4-(2-piperidin-2-yl-ethoxy)-1H-quinolin-2-one (200 mg in 5 mL dicloroethane) was added 136 mg of 2-(trimethylsilyl)ethyl 4-nitrophenyl carbonate followed by 0.092 mL diisopropylethylamine and the mixture heated to reflux. After 20 hours, the reaction was cooled to room temperature, concentrated in vacuo and purified by flash chromatography on silica gel (ethyl acetate:hexane, 1:1) to give the title compound (183 mg.)

Provenance & Evidence