作者:Michael T Huggins、David A Lightner
DOI:10.1016/s0040-4020(01)00109-0
日期:2001.3
[10]-Semirubin (1) and [20]-semirubin (2), with dipyrrinones covalently linked to C10 and C20 fatty acid chains, were synthesized following Friedel–Crafts acylation of the parent 9-H dipyrrinone, (4Z)-2,3,7,8-tetramethyl-(10H)-dipyrrin-1-one, with the diacid chlorides of decanedioic acid and eicosanedioic acid, respectively. Both of these bright yellow pigments are monomeric in CHCl3 solvent: MWobs=394±20
[10] -Semirubin(1)和[20] -Semirubin(2),将吡啶酮与C 10和C 20脂肪酸链共价连接,是在母体9-H吡啶酮的Friedel-Crafts酰化后合成的(4 Z)-2,3,7,8-四甲基-(10 H)-联吡啶-1-一,分别具有癸二酸和二十二碳二酸的二酰氯。这两个明亮的黄色颜料的是单体在CHCl 3溶剂:MW OBS = 394±20 1(式量386),以及用于533±20 2通过蒸气压渗透法(VPO)测量确定的最大重量(配方重量526)。相反,它们的甲酯在CHCl 3中为二聚体。在1和2的内酰胺NH和羧酸OH之间发现1 H 1 H}-核Overhauser效应,这与胆红素(黄疸的黄色颜料)及其类似物中发现的分子内氢键类型一致。