Modulating OxyB-Catalyzed Cross-Coupling Reactions in Vancomycin Biosynthesis by Incorporation of Diverse <scp>d</scp>-Tyr Analogues
作者:Seyma Ozturk、Clarissa C. Forneris、Andy K. L. Nguy、Erik J. Sorensen、Mohammad R. Seyedsayamdost
DOI:10.1021/acs.joc.8b00916
日期:2018.7.6
synthesizing diverse d-Tyr analogues, one of the constituents of the antibiotic vancomycin, using a Negishi cross-coupling protocol. Several analogues were incorporated into the vancomycin substrate–peptide and reacted with the biosynthetic enzymes OxyB and OxyA, which install the characteristic aromatic cross-links. We find that even small structural perturbations are not accepted by OxyA. The same modifications
我们报告了使用Negishi交叉偶联方案合成多种d- Tyr类似物(抗生素万古霉素的成分之一)的一般方法。万古霉素底物肽中掺入了几种类似物,并与生物合成酶OxyB和OxyA反应,后者安装了独特的芳香族交联键。我们发现,即使很小的结构扰动也不能被OxyA接受。但是,相同的修饰增强了OxyB的催化能力,导致在万古霉素骨架内形成新的大环。