(alphaRS,S)-alpha-benzyl-1-t-butoxycarbonyl-gamma-oxo-2-pyrrolidinebutyric acid → HCID 178456010, compound

Participants

Reaction Steps

In a manner analogous to that described in Example 27, by condensing (αRS,S)-α-benzyl-1-t-butoxycarbonyl-γ-oxo-2-pyrrolidinebutyric acid with (S)-α-amino-N-[(1S,2S,4S)-1-(cyclohexylmethyl)-2-hydroxy-4-isopropyl-5-hexenyl]imidazole-4-propionamide and subsequent epimer separation by chromatography, there were obtained t-butyl (S)-2-[[(S)-α-[[(S)-1-[[(1S,2S,4S)-1-(cyclohexylmethyl)-2-hydroxy-4-isopropyl-5-hexenyl]carbamoyl]-2-imidazol-4-ylethyl]carbamoyl]phenethyl]acetyl]-1-pyrrolidinecarboxylate (less polar isomer) and t-butyl (S)-2-[[(R)-γ-[[(S)-1-[[(1S,2S,4S)-1-(cyclohexylmethyl)-2-hydroxy-4-isopropyl-5-hexenyl]carbamoyl]-2-imidazol-4-ylethyl]carbamoyl]phenethyl]acetyl]-1-pyrrolidinecarboxylate. MS: 734 (M+H)+

Provenance & Evidence