Trifluoroacetic acid → (2S)-2-[(2-Chloro-5-nitrophenoxy)methyl]pyrrolidine

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Reaction Steps

(S)-2-(2-Chloro-5-nitro-phenoxymethyl)-pyrrolidine-1-carboxylic acid tert-butyl ester (6.94 g, 19.45 mmol) was stirred in 30 mL CH2Cl2 and 20 ml TFA for 3 h. The reaction was concentrated and dissolved in 0.1 N HCl (aq), which was basified to pH>12 with solid NaOH and extracted 3× with EtOAc. The organic layers were washed once with 1 N NaOH then once with a mixture of brine and 1 N NaOH. The organic layers were combined, dried over Na2SO4, filtered, and concentrated to dryness, to yield the title compound as a yellow solid.

Provenance & Evidence