Trifluoroacetic acid → {(2S,3S)-2-[2-(3-amino-5-trifluoromethyl-phenylcarbamoyl)-acetylamino]-3-hydroxyhexyl}-(2,4-dimethyl-benzyl)-carbamic acid benzyl ester

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Reaction Steps

The compound (3-{2-[(1S,2S)-1-{[benzyloxycarbonyl-(2,4-dimethyl-benzyl)-amino]-methyl}-2-hydroxy-pentylcarbamoyl]-acetylamino}-5-trifluoromethyl-phenyl)-carbamic acid tert-butyl ester (577 mg, 0.79 mmol) was dissolved in CH2Cl2 (12 mL) and treated with TFA (4 mL). The solution was stirred for 3 h and then concentrated in vacuo. The residue was dissolved in benzene and concentrated in vacuo; this procedure was repeated to provide {(2S,3S)-2-[2-(3-amino-5-trifluoromethyl-phenylcarbamoyl)-acetylamino]-3-hydroxyhexyl}-(2,4-dimethyl-benzyl)-carbamic acid benzyl ester (100% yield). MS found: (M+H)+=629.4.

Provenance & Evidence