Synthetic libraries of tyrosine-derived bacterial metabolites
作者:Savvas N. Georgiades、Jon Clardy
DOI:10.1016/j.bmcl.2007.10.058
日期:2008.5
The preparation of a collection of 131 small molecules, reminiscent of families of long chain N-acyl tyrosines, enamides and enol esters that have been isolatedfromheterologous expression of environmentalDNA (eDNA) in Escherichia coli, is reported. The synthetic libraries of N-acyl tyrosines and their 3-keto counterparts were prepared via solid-phase routes, whereas the enamides and enol esters
据报道,制备了 131 个小分子的集合,让人联想到长链 N-酰基酪氨酸、烯酰胺和烯醇酯家族,这些分子是从大肠杆菌环境 DNA (eDNA) 的异源表达中分离出来的。N-酰基酪氨酸及其3-酮对应物的合成库是通过固相途径制备的,而烯酰胺和烯醇酯是在溶液相中合成的。
The Ras Pathway Modulator Melophlin A Targets Dynamins
作者:Tanja Knoth、Karin Warburg、Catherine Katzka、Amrita Rai、Alexander Wolf、Andreas Brockmeyer、Petra Janning、Thomas F. Reubold、Susanne Eschenburg、Dietmar J. Manstein、Katja Hübel、Markus Kaiser、Herbert Waldmann
DOI:10.1002/anie.200902023
日期:2009.9.14
combination of organic synthesis, chemical proteomics, biophysics, and cell and molecular biology investigations reveals that the natural product melophlin A (purple) influences signal propagation through the Ras network by interfering with the function of dynamins (green) in endocytosis.
Control of β‐Branching in Kalimantacin Biosynthesis: Application of<sup>13</sup>C NMR to Polyketide Programming
作者:Paul D. Walker、Christopher Williams、Angus N. M. Weir、Luoyi Wang、John Crosby、Paul R. Race、Thomas J. Simpson、Christine L. Willis、Matthew P. Crump
DOI:10.1002/anie.201905482
日期:2019.9.2
The presence of β-branches in the structure of polyketides that possess potent biological activity underpins the widespread importance of this structural feature. Kalimantacin is a polyketide antibiotic with selective activity against staphylococci, and its biosynthesis involves the unprecedented incorporation of three different and sequential β-branching modifications. We use purified single and multi-domain
在具有强大生物活性的聚酮化合物结构中,β分支的存在加强了该结构特征的广泛重要性。卡来木霉素是一种对葡萄球菌具有选择性活性的聚酮类抗生素,其生物合成涉及三个不同且连续的β-分支修饰的空前结合。我们使用kalimantacin生物合成机制的纯化的单域和多域酶组分来解决体外如何控制kalimantacin中β分支的模式。要对酶产物进行有力的区分,就需要开发一种通用的测定方法,该方法利用结合到关键生物合成模拟物中的单个13 C标记物的13 C NMR以及酰基载体蛋白的良好动态特性。
Acyl/aroyl Meldrum’s acid as an enol surrogate for the direct organocatalytic synthesis of α,β-unsaturated ketones
作者:Tushar M. Khopade、Prakash K. Warghude、Trimbak B. Mete、Ramakrishna G. Bhat
DOI:10.1016/j.tetlet.2018.12.013
日期:2019.1
E-selective α,β-unsaturatedketones. The method utilizes simple and easily accessible starting materials such as Meldrum’s acid, carboxylic acid, aldehyde and simple bifunctional amine catalyst. The tandem organocatalytic process utilizes acyl/aroyl Meldrum’s acid as an enol surrogate for the effective Doebner-Knoevenagel type condensation reactions. A wide variety of aldehydes, carboxylic acids and base
A small parallel library of 1,4,5-trisubstitutedpyrazoles was prepared in solution using a three-step procedure starting from Meldrum acid. The Meldrum acid was acylated with different acyl chlorides and the products opened with different alcohols and amines to give substituted β-keto esters and β-keto amines. Further reaction with N,N-dimethylformamide dimethylacetal and the final cyclisation were