and found to engage in intramolecular hydrogen bonding. Like bilirubin, the propionic acid carboxyl group of hemirubin is linked to the opposing dipyrrinone by intramolecular hydrogen bonds, and thus, 1 shares in some of the solution properties of its parent bilirubin, e.g., an acid that is less polar than its methyl ester.
一半
胆红素的模型,这是一种黄疸的神经毒性黄橙色色素,9- [2-(2-羧乙基)苄基] -2,3,7,8-四甲基-1,10-二氢联
吡啶(1,半柔红素) SnCl(4)催化在2,3,7,8-1-oxo-1,10-dihydrodipyrrin(7)的C(9)上用邻-(
氯羰基)氢
肉桂酸甲酯合成了Friedel-Crafts酰化反应。与较早的
胆红素模型化合物不同,半红素被预测并发现参与分子内氢键。像
胆红素一样,半红素的
丙酸羧基通过分子内氢键与相对的二
吡啶酮相连,因此,在其母体
胆红素的某些溶液性质中有1股,例如极性比其甲酯低的酸。