N-(4-Substituted-benzoyl)-N′-(β-d-glucopyranosyl)ureas as inhibitors of glycogen phosphorylase: Synthesis and evaluation by kinetic, crystallographic, and molecular modelling methods
作者:Veronika Nagy、Nóra Felföldi、Bálint Kónya、Jean-Pierre Praly、Tibor Docsa、Pál Gergely、Evangelia D. Chrysina、Costas Tiraidis、Magda N. Kosmopoulou、Kyra-Melinda Alexacou、Maria Konstantakaki、Demetres D. Leonidas、Spyros E. Zographos、Nikos G. Oikonomakos、Stanislav Kozmon、Igor Tvaroška、László Somsák
DOI:10.1016/j.bmc.2011.12.059
日期:2012.3
yl)-N′-(β-d-glucopyranosyl) ureas (substituents: Me, Ph, Cl, OH, OMe, NO2, NH2, COOH, and COOMe) were synthesised by ZnCl2 catalysed acylation of O-peracetylated β-d-glucopyranosyl urea as well as in reactions of O-peracetylated or O-unprotected glucopyranosylamines and acyl-isocyanates. O-deprotections were carried out by base or acid catalysed transesterifications where necessary. Kinetic studies
通过ZnCl 2合成了N-(4-取代的苯甲酰基)-N '-(β- d-吡喃葡萄糖基)脲(取代基:Me,Ph,Cl,OH,OMe,NO 2,NH 2,COOH和COOMe)O-过乙酰化的β- d-吡喃葡萄糖基脲的催化酰化反应以及O-过乙酰化或O-未保护的吡喃葡萄糖胺与酰基异氰酸酯的反应。必要时,通过碱或酸催化的酯交换反应进行O-脱保护。动力学研究表明,这些化合物大多数是兔肌肉糖原磷酸化酶b(RMGP b)的低微摩尔抑制剂。最好的抑制剂是4-甲基苯甲酰基化合物(K i = 2.3μM)。的几个与RMGP的化合物的复合物的晶体分析b表明,类似物利用,与水分子一起,在β口袋亚位点中的可用空间,并诱导相比RMGP一个所述280S环路的多个扩展移b在复杂与未取代的苯甲酰脲。结果表明水分子在配体结合和基于结构的配体设计中的关键作用。进行了选定抑制剂的分子对接研究,以显示结合亲和力预测的能力。计算得分最高