三氟乙酸 、
{(1S,2S,4S)-4-(2,2-dimethylpropylcarbamoyl)-1-[2,2-dimethyl-4-(5-fluoro-2-methylphenyl)-5-oxopiperazin-1-ylmethyl]-2-hydroxy-5-methylhexyl}carbamic acid t-butyl ester 、
富马酸 、
(2S,4S,5S)-5-amino-6-[2,2-dimethyl-4-(5-fluoro-2-methylphenyl)-5-oxopiperazin-1-yl]-4-hydroxy-2-isopropylhexanoic acid (2,2-dimethylpropyl)amide 在
碳酸氢钠 、
二氯甲烷 、
magnesium sulfate 、 silica gel 、 dichloromethane MeOH Et3N 作用下,
以
二氯甲烷 、
甲醇 为溶剂,
反应 0.58h,
以to obtain 100 mg of the title compound (yield: 74%)的产率得到(2S,4S,5S)-5-Amino-6-[2,2-dimethyl-4-(5-fluoro-2-methylphenyl)-5-oxopiperazin-1-yl]-4-hydroxy-2-isopropylhexanoic acid (2,2-dimethylpropyl)amide hemifumarate