反应详情

In an analogous manner to that described in Example 19, by condensing (S)-α-amino-N-[(1S,2R,3S)-1-(cyclohexylmethyl)-3-cyclopropyl-2,3-dihydroxypropyl]imidazole-4-propionamide with Fmoc-Phe-OH there was obtained 9H-fluoren-9-ylmethyl [(S)-α-[[(S)-1-[[(1S,2R, 3S)-1-(cyclohexylmethyl)-3-cyclopropyl-2,3-dihydroxypropyl]carbamoyl]-2-imidazol-4-ylethyl]carbamoyl]phenethyl]carbamate which, by reaction with piperidine in methylene chloride, was converted into (S)-N-[(1S,2R,3S)-1-(cyclohexylmethyl)-3-cyclopropyl-2,3-dihydroxypropyl]-α-[(3-phenyl-L-alanyl)amino]imidazole-4-propionamide. Further condensation with Boc-D-Pro-OH, analogously to Example 19, yielded (R)-2-[[(S)-α-[[(S)-1-[[(1S,2R,3S)-1-(cyclohexylmethyl)-3-cyclopropyl-2,3-dihydroxypropyl]carbamoyl]-2-imidazol-4-ylethyl]carbamoyl]phenethyl]carbamoyl]-1-pyrrolidinecarboxylic acid tert-butyl ester as an amorphous solid, MS: 709 (M+H)+.