Chlorosuccinimide → L-Valine, N-[2-chloro-4-(trifluoromethyl)phenyl]-

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Reaction Steps

To the m-phenoxybenzyl ester of N-(p-trifluoromethylphenyl)valine (1.57 g) in about 15 ml benzene, with stirring and under nitrogen, is added N-chlorosuccinimide (0.53 g). The reaction mixture is heated to reflux for about 2 hours. The reaction is cooled and partitioned between ether and water. Aqueous phase is back-extracted with ether. The combined ether phases are washed with water and brine, dried over sodium sulfate, filtered and evaporated. The reaction product is put on preparative TLC plates and eluted using 10% ether/hexane to yield the m-phenoxybenzyl ester of N-(2-chloro-4-trifluoromethylphenyl)valine, MS m/e 477.1 (M+).

Provenance & Evidence