Microwave-assisted decarboxylation of bicyclic 2-pyridone scaffolds and identification of Aβ-peptide aggregation inhibitors
作者:Veronica Åberg、Fredrik Norman、Erik Chorell、Andreas Westermark、Anders Olofsson、A. Elisabeth Sauer-Eriksson、Fredrik Almqvist
DOI:10.1039/b503294f
日期:——
A reagent-free microwave-assisted decarboxylation procedure for carboxylic acid functionalized bicyclic 2-pyridones has been developed. This new method, based on microwave heating at 220 °C for 600 seconds in N-methyl pyrrolidone (NMP), proved to be practical and very efficient, resulting in decarboxylated 2-pyridones in near-quantitative yields. The decarboxylated products and the intermediate 2-pyridones in the form of carboxylic acid methyl esters and carboxylic acids were screened for their effect on Aβ-peptide aggregation. Two out of the 21 2-pyridones described in this study inhibited amyloid formation of the Alzheimer Aβ(1â40) peptide. The effect was seen even at a 4 : 1 ratio of 2-pyridone and monomeric Aβ-peptide.
开发了一种无试剂的微波辅助去羧化程序,用于羧酸功能化的双环2-吡啶酮。该新方法基于在N-甲基吡咯烷酮(NMP)中以220°C加热600秒,证明实用且非常高效,产生的去羧化2-吡啶酮几乎定量。去羧化产品和羧酸甲酯及羧酸形式的中间体2-吡啶酮被筛选以研究其对Aβ肽聚集的影响。在本研究中描述的21种2-吡啶酮中,有两种抑制了阿尔茨海默病Aβ(1–40)肽的淀粉样蛋白形成。即使在2-吡啶酮与单体Aβ肽的比率为4:1时,仍观察到了这种效果。