摘要
针对液相合成对羧基苯胺发色底物的不足,采用Boc-对羧基苯肼和MBHA树脂为原料合成了具有保险拉手型连接臂结构的树脂,对保护基形式及树脂载体类型的选择进行了探讨。基于该型树脂采用微波辅助的Fmoc/Boc混合策略在树脂上合成了5个用于丝氨酸蛋白酶活性实验的多肽中间体,经温和的N-溴代琥珀酰亚胺/吡啶条件氧化连接臂后,与对硝基苯胺(pNA)发生氨解反应,以较高的收率和纯度得到5个丝氨酸蛋白酶发色底物。中间体及产物经过高分辨质谱和核磁共振氢谱确定了结构。
N'-Phenylacylhydrazide safly-catch resin was syn- thesized by derlvatizing commercial available MBHA resin with N'-Boc-4-hydrazinobenzoic acid. N'-Protection form of 4- hydrazinobenzoic acid and initial amino functional resin type have been investigated to achieve higher derivation yield. Five serine protease peptidyl-pNA chromogenic substrates were synthesized with the safty-catch resin by Boc/Fmoc hybrid- ized protocol with high yields and purity. Intermediates and product were characterized by HRMS and NMR.
出处
《化学试剂》
CAS
CSCD
北大核心
2012年第11期967-971,共5页
Chemical Reagents
基金
国家自然科学基金资助项目(81001366)
药物研究所科研基金资助项目(2012CHX12)
关键词
保险拉手连接臂
对羧基苯肼
氨解反应
酶发色底物
多肽固相合成
safty-catch linker
4-hydrazinobenzoic acid
am- monolysis
chromogenic enzyme substrate
solid phase peptide synthesis