pentyl 4-[(2S)-2-[[4-[[2-(dimethylamino)-2-oxoethyl]carbamoylamino]-6-phenylpyridine-2-carbonyl]amino]-5-[(2-methylpropan-2-yl)oxy]-5-oxopentanoyl]piperazine-1-carboxylate 在
三氟乙酸 作用下,
以
二氯甲烷 为溶剂,
以53 mg的产率得到(4S)-4-[((4-[(([2-(dimethylamino)-2-oxoethyl]amino)carbonyl)amino]-6-phenylpyridin-2-yl)carbonyl)amino]-5-oxo-5-(4-[(pentyloxy)carbonyl]piperazin-1-yl)pentanoic acid