N-[(2R,3S)-3-氨基-2-羟基-4-苯基丁基]-N-(2-甲基丙基)-4-硝基- 苯磺酰胺盐酸盐 、
(R)-3-[3,4-dimethoxyphenyl]-1-{3-[2-(3-hydroxypropylamino)-1-oxoethoxy]phenyl}propyl (S)-1-(3,3-dimethyl-2-oxopentanoyl)piperidine-2-carboxylate 、
N,N'-羰基二咪唑 在
crude residue 、
甲醇 、
二氯甲烷 作用下,
以
乙酸乙酯 为溶剂,
反应 24.0h,
以to afford conjugate 22 (10 mg, 7%) as a light yellow foam的产率得到(S)-{(R)-1-{3-[(10S,11R)-10-benzyl-11-hydroxy-15-methyl-13-(4-nitrophenylsulfonyl)-2,8-dioxo-7-oxa-3,9,13-triazahexadecyloxy]phenyl}-3-(3,4-dimethoxyphenyl)propyl} 1-(3,3-dimethyl-2-oxopentanoyl)piperidine-2-carboxylate