N1-[2-(benzylthio)-1(R)-(dimethoxymethyl)ethyl]-N2-[N-[N-[N-[N-[3-(tert-butoxycarbonyl)propionyl]-O-tert-butyl-L-alpha-aspartyl]-O-tert-butyl-L-alpha-glutamyl]-2-methyl-L-phenylalanyl]-3-methyl-L-valyl]-L-leucinamide 在
水 甲苯 、
乙醚 作用下,
以
trifluoracetic acid-dichloromethane 为溶剂,
反应 1.5h,
以to give 40 mg of 3-(benzylthio)-2(R)-[[N-[N-[N-[N-[N-(3-carboxypropionyl)-L-α-aspartyl]-L-α-glutamyl]-2-methyl-L-phenylalanyl]-3-methyl-L-valyl]-L-leucyl]amino]propionaldehyde as a white solid的产率得到(4S)-5-[[(1S)-2-[[(1S)-1-[[(1S)-1-[[(1R)-1-(benzylsulfanylmethyl)-2-oxo-ethyl]carbamoyl]-3-methyl-butyl]carbamoyl]-2,2-dimethyl-propyl]amino]-1-(o-tolylmethyl)-2-oxo-ethyl]amino]-4-[[(2S)-4-hydroxy-2-[(4-hydroxy-4-oxo-butanoyl)amino]-4-oxo-butanoyl]amino]-5-oxo-pentanoic acid