Aromatic congeners of bilirubin: synthesis, stereochemistry, glucuronidation and hepatic transport
作者:Justin O Brower、David A Lightner、Antony F McDonagh
DOI:10.1016/s0040-4020(01)00773-6
日期:2001.9
A new synthetic analog (1) of the bile pigment bilirubin-IXα (bilirubin, Fig. 1) with phenyl groups replacing vinyl was prepared by a constitutional scrambling reaction of a mixture of two new, symmetric phenylrubin analogs (2 and 3) of bilirubin-XIIIα and IIIα. The former (2) with two endo-phenyls, and the latter (3) with two exo-phenyls were synthesized by condensation of a dipyrrylmethane dialdehyde
通过将两个新的对称胆红素苯基胆红素类似物(2和3)的混合物进行结构加扰反应,制备了一个新的苯酚色素胆红素-IXα(胆红素,图1)的合成类似物(1),其中苯基取代了乙烯基。 -XIIIα和IIIα。前者(2)具有两个内切-phenyls,而后者(3)具有两个外-phenyls通过一个dipyrrylmethane二醛与适当methylphenylpyrrolinones,将其在几个步骤中制备的由4-甲基-3-苯基-2的缩合合成-(对甲苯磺酰基)吡咯,由Barton-Zard吡咯合成而得。核过载效应11 – 3的1 H NMR研究证实,与它们的胆红素当量一样,这些橙黄色颜料采用分子内氢键键合的脊-瓦构象。反相HPLC和TLC表明3的极性小于2,而1的极性中等。在的感应圆二色光谱差异大1 - 3中的人血清白蛋白的pH7.4的缓冲水溶液中发现。