Trifluoroacetic acid → benzyl (S)-1-((1S,2R,4R)-2-amino-4-(isopropyl(methyl)amino)cyclohexyl)-2-oxopyrrolidin-3-ylcarbamate

Participants

Reaction Steps

A stirring solution of 2-(trimethylsilyl)ethyl (1R,2S,5R)-2-((S)-3-benzyloxycarbonylamino-2-oxopyrrolidin-1-yl)-5-(isopropyl(methyl)amino)cyclohexylcarbamate (272 mg, 0.5 mmol) in dichloromethane (3 mL) was charged with trifluoroacetic acid (2 mL). The reaction was stirred for 2 h at room temperature and concentrated in vacuo. The residue was dissolved in dichloromethane (50 ml) and washed with saturated NaHCO3 (15 ml). the aqueous layer was extracted with dichloromethane (4×30 ml). Combined all the dichloromethane layers and dried over anhydrous Na2SO4, filtered, and concentrated in vacuo to give benzyl (S)-1-((1S,2R,4R)-2-amino-4-(isopropyl(methyl)amino)cyclohexyl)-2-oxopyrrolidin-3-ylcarbamate (190 mg, 94.5%). LC/MS found [M+H]+=403.

Provenance & Evidence