Eleven glycosyl coumarylthiazole derivatives are synthesized by cyclization and condensation of glycosyl thiourea with 3-bromoacetyl coumarins in ethanol. The reaction conditions are optimized and good yields of products (80%–95%) are obtained. The structures of all new products were confirmed by IR, 1H and 13C NMR, and by HRMS (electrospray ionization). The in vitro acetylcholinesterase (AChE) inhibitory
通过糖基硫脲与3-溴乙酰基香豆素在乙醇中的环化和缩合反应,合成了11种糖基香豆基噻唑衍生物。优化了反应条件,并获得了良好的收率(80%–95%)。所有新产品的结构均通过IR,1 H和13 C NMR以及HRMS(电喷雾电离)确定。在体外乙酰胆碱酯酶抑制这些新化合物的活性由Ellman氏方法进行测试。其中,N-(2-乙酰氨基-3,4,6-三-O-乙酰基-2-脱氧-β - D-吡喃吡喃糖基)-4-(6-硝基香豆基)-1,3-噻唑-2-胺在体外显示出最佳活性AChE抑制率为58%,IC 50值为12±0.38μg/ mL。
Synthesis of and Specific Antibody Generation for Glycopeptides with Arginine<i>N</i>-GlcNAcylation
作者:Man Pan、Shan Li、Xiang Li、Feng Shao、Lei Liu、Hong-Gang Hu
DOI:10.1002/anie.201407824
日期:2014.12.22
and biochemical studies on arginine N‐glycosylation, we report the first general strategy for a rapid and cost‐effective synthesis of glycopeptides carrying single or multiple arginine N‐GlcNAcyl groups. These glycopeptides were successfully utilized to generate the first antibodies that can specifically recognize arginine N‐GlcNAcylated peptides or proteins in a sequence‐independent manner.