Total Syntheses of Thiocoraline and BE-22179 and Assessment of Their DNA Binding and Biological Properties
作者:Dale L. Boger、Satoshi Ichikawa、Winston C. Tse、Michael P. Hedrick、Qing Jin
DOI:10.1021/ja003602r
日期:2001.1.1
Full details of the totalsyntheses of thiocoraline (1) and BE-22179 (2), C(2) symmetric bicyclic octadepsipeptides possessing two pendant 3-hydroxyquinoline chromophores, are described in which their relative and absolutestereochemistry were established. Key elements of the approach include the late-stage introduction of the chromophore, symmetrical tetrapeptide coupling, macrocyclization of the
Synthetic studies of thiazoline and thiazolidine-containing natural products — 1. Phosphorus pentachloride-mediated thiazoline construction reaction
作者:Akira Ino、Akira Murabayashi
DOI:10.1016/s0040-4020(99)00582-7
日期:1999.8
Phosphorus pentachloride effectively mediates the cyclization of N-acylcysteamine derivatives giving rise to thiazoline rings. Using this method, sterically hindered thiazoline analogs could be constructed and thus segment A (the left half) of micacocidin, a unique antimycoplasma antibiotic, was synthesized efficiently.
Deciphering Nature’s Intricate Way of <i>N</i>,<i>S</i>-Dimethylating <scp>l</scp>-Cysteine: Sequential Action of Two Bifunctional Adenylation Domains
作者:Shogo Mori、Atefeh Garzan、Oleg V. Tsodikov、Sylvie Garneau-Tsodikova
DOI:10.1021/acs.biochem.7b00980
日期:2017.11.21
sequential action of two of such independent enzymes. Herein, to establish the method by which Nature N,S-dimethylates l-Cys, we studied its formation during thiochondrilline A biosynthesis by evaluating TioS(A3aM3SA3bT3) and TioN(AaMNAb). This study not only led to identification of the exact pathway followed in Nature by these two enzymes for N,S-dimethylation of l-Cys, but also revealed that a single interrupted
氨基酸的二甲基化包括一系列有趣且令人费解的事件,这些事件可以在非核糖体肽生物合成过程中通过单个甲基化(M)结构域中断的单个腺苷酸化(A)结构域,或通过两个此类独立分子的顺序作用来实现酶。在本文中,为了建立自然N,S-二甲基化L -Cys的方法,我们通过评估TioS(A 3a M 3S A 3b T 3)和TioN(A a M N A b)。这项研究不仅确定了自然界中这两种酶对L -Cys进行N,S-二甲基化所遵循的确切途径,而且还揭示了一个单独的中断A结构域可以使N,N-二甲基化氨基酸,这是一种新现象在非核糖体肽领域。这些发现为新型中断的A结构域酶的开发和工程设计提供了重要而有用的见解,将来可作为组合生物合成的工具。
Synthesis of functionalized analogs of pyochelin, a siderophore of Pseudomonas aeruginosa and Burkholderia cepacia
作者:Freddy Rivault、Viviane Schons、Clémence Liébert、Alain Burger、Elias Sakr、Mohamed A. Abdallah、Isabelle J. Schalk、Gaëtan L.A. Mislin
DOI:10.1016/j.tet.2005.12.012
日期:2006.3
Using an improved synthesis of pyochelin, a siderophore common to several pathogenic Pseudomonas species, three functionalized pyochelin analogs were efficiently synthesized starting from appropriate 2-hydroxybenzonitriles.
An Improved Stereocontrolled Synthesis of Pyochelin, Siderophore of Pseudomonas aeruginosa and Burkholderia cepacia
作者:Adel Zamri、Mohamed A Abdallah
DOI:10.1016/s0040-4020(99)00946-1
日期:2000.1
A considerably improvedstereocontrolledsynthesis of pyochelin, a hydroxyphenylthiazolinylthiazolidine type of siderophore common to most strains of Pseudomonas aeruginosa and Burkholderia cepacia is described. 2′-(2-Hydroxyphenyl)-2′-thiazoline-4′-carboxaldehyde, a key molecule involved in this synthesis has been prepared by reduction of 2′-(2-hydroxyphenyl)-2′-thiazoline-4′-(N-methoxy,N-methyl)