Synthesis and conformation of a bilirubin analog with propionic acid side chains extended to undecanoic acid
作者:John Chiefari、Richard V. Person、David A. Lightner
DOI:10.1016/s0040-4020(01)89846-x
日期:1992.1
A lipophilic analog of bilirubin with propionic acid groups replaced by undecanoic acid groups (1), was synthesized from 11-bromo-undecanoic acid. UV-visible and NMR spectroscopic analyses suggest reduced intramolecular H-bonding and a preference for a helical conformation. Molecular dynamics computations predict a global energy minimum for a helical porphyrin-like conformation with unusual distorted
由11-溴-十一烷酸合成了胆红素的亲脂性类似物,其中丙酸基团被十一烷酸基团(1)取代。紫外可见和NMR光谱分析表明分子内的H键减少,并且对螺旋构象的偏爱。分子动力学计算预测,当调用H键时,具有异常扭曲结构的螺旋卟啉样构象的整体能量最小值。色素复合物与人血清白蛋白的圆二色性产生胆红素样双信号棉花效应:Δϵ max 449 = + 33,Δϵ max 396 = -47。