N2-[N-[N-[N-[N-[3-(tert-butoxycarbonyl)propionyl]-O-tert-butyl-L-α-aspartyl]-O-tert-butyl-L-α-glutamyl]-2-methyl-L-phenylalanyl]-3-methyl-L-valyl]-N1-[1(S)-(dimethoxymethyl)-3-butynyl]-L-leucinamide 、
二氯甲烷 、
水 在
silica gel 作用下,
以
三氟乙酸 为溶剂,
反应 0.5h,
以There were obtained 36 mg of 2(RS)-[[N-[N-[N-[N-[N-[(3-carboxypropionyl)-L-α-aspartyl]-L-α-glutamyl]-2-methyl-L-phenylalanyl]-3-methyl-L-valyl]-L-leucyl]amino]-4-pentynal (9:1 mixture of diastereoisomers) as a white solid的产率得到[N-[N-[N-[N-[N-[(3-carboxypropionyl)-L-alpha-aspartyl]-L-alpha-glutamyl]-2-methyl-L-phenylalanyl]-3-methyl-L-valyl]-L-leucyl]amino]-4-pentynal