{(R)-1-[(1S,2S,4R)-2-Hydroxy-1-isobutyl-4-((S)-1-isobutylcarbamoyl-2-methyl-propylcarbamoyl)-pentylcarbamoyl]-2-methylsulfanyl-ethyl}-carbamic acid 3,5-dimethyl-pyrazol-1-ylmethyl ester 在
间氯过氧苯甲酸 作用下,
以
甲醇 、
二氯甲烷 为溶剂,
以86%的产率得到{(R)-1-[(1S,2S,4R)-2-Hydroxy-1-isobutyl-4-((S)-1-isobutylcarbamoyl-2-methyl-propylcarbamoyl)-pentylcarbamoyl]-2-methanesulfonyl-ethyl}-carbamic acid 3,5-dimethyl-pyrazol-1-ylmethyl ester