Efficient Synthesis of B- and C-Rings Components of Phycobilin Derivatives for Structure/Function Analysis of Phytochrome
摘要:
从相应的内酯开始,高效地制备出了植物纤维素衍生物的 B 环和 C 环成分。这种合成方法不仅可以制备植物花青素(PCB),还可以制备具有丁酸侧链而非丙酸侧链的 PCB 衍生物、C8 或 C12 处的区域选择性单酯化 PCB 衍生物,以及 PCB 与 B 环和 C 环的甲基和丙酸取代基的区域异构体,从而首次实现了对植物色素的结构/功能分析。
C/D-Rings component of phytochromobilin dimethyl ester was readily synthesized by employing our recent new preparative method for 3,4-disubstituted 1,5-dihydro-2H-pyrrol-2-ones and their coupling with a 2-formylpyrrole. A convenient method for the preparation of a substituted pyrrole common to B- and C-rings was also described.
植物色素二甲酯的 C/D 环组分很容易通过我们最近新的制备方法合成,用于 3,4-二取代的 1,5-二氢-2H-吡咯-2-ones 及其与 2-甲酰基吡咯的偶联。还描述了一种制备 B 环和 C 环共有的取代吡咯的方便方法。
Drinan, Martin A.; Lash, Timothy D., Journal of Heterocyclic Chemistry, 1994, vol. 31, # 1, p. 255 - 258
作者:Drinan, Martin A.、Lash, Timothy D.
DOI:——
日期:——
Synthesis and Hepatic Metabolism of Xanthobilirubinic Acid Regioisomers
作者:Stefan E. Boiadjiev、Brian A. Conley、Justin O. Brower、Antony F. McDonagh、David A. Lightner
DOI:10.1007/s00706-006-0543-8
日期:2006.11
A set of four regioisomeric dipyrrinone propionic acids has been synthesized and their hepatic metabolism examined in rats: xanthobilirubinic acid and pseudo-xanthobilirubinic acid each with a propionic acid on a pyrrole ring; exo-psi-xanthobilirubinic acid and endo-psi-xanthobilirubinic acid, each with a propionic acid transposed to a lactam ring. After intravenous injection all four isomers were excreted to some degree in unchanged form in bile in normal rats. Xanthobilirubinic acid, the structurally closest dipyrrinone to bilirubin, and exo-psi-xanthobilirubinic acid were excreted almost entirely in unchanged form. However, a small fraction of xanthobilirubinic acid acyl glucuronide was also detected. More extensive acyl glucuronidation was observed for pseudo-xanthobilirubinic acid, and endo-psi-xanthobilirubinic acid underwent slow metabolism to unidentified more polar products that did not seem to be glucuronides.
Tetrapyrroles. V. Formal syntheses of the ring-C,D pyrromethenones of phytochrome and phycocyanin
作者:Peter A. Jacobi、Robert W. DeSimone
DOI:10.1016/s0040-4039(00)60942-5
日期:1992.10
Formal syntheses of pyrromethenones 2 and 3, potential intermediates for the preparation of phycocyanin (5) and phytochrome (4). respectively. have been accomplished by Pd(o) mediated coupling of iodopyrrole 7 with acetylenic amides of general structure 8a,b, followed by F- catalyzed 5-exo-dig cyclization and DDQ oxidation.