{4-(N'-2,4,6-trimethylphenylsulfonyl-guanidino)-1(S)-[4-(N'-2,4,6-trimethylphenylsulfonyl-guanidino)-1(S)-(1-naphthalen-1(S)-yl-ethylcarbamoyl)-butylcarbamoyl]-butyl}-carbamic acid tert-butyl ester 在
茴香硫醚 、
间甲酚 三甲基溴硅烷 、
三氟乙酸 作用下,
反应 3.0h,
以58%的产率得到(2S)-2-amino-5-guanidino-N-[(1S)-4-guanidino-1-[[(1S)-1-(1-naphthyl)ethyl]carbamoyl]butyl]pentanamide