带有拴系亲核试剂的炔烃的碘环化是构建和多样化杂环的高效方法。该方法的主要局限性是炔类化合物的5 -endo-dig碘环化,它对亲电环化有不利的电子偏倚。这些趋向于将碘鎓原子的亲电子攻击指向错误的碳以进行环化,因此有利于竞争性加成反应。使用我们先前确定的用于电子耐性炔烃的5-内切式碘环化的反应条件,我们已经成功合成了2-羧基(和亚砜氧基)-3-碘代苯并[ b ]噻吩的合成途径。相应的苯并[ b在这些条件下无法获得呋喃和吲哚。这种差异可能是由于在碘代苯并[ b ]噻吩的情况下可利用自由基机理而引起的。碘环化产物的2-羧基官能度可进一步用于迭代炔烃偶联碘环化反应中,其中羧基或亚胺(席夫碱)参与第二次碘环化以生成内酯或吡啶环。
A mild and odorless copper-catalyzed thiolation of terminal alkynes with thiosulfonates is described. The broad substrate scope provides convenient access to a wide variety of sulfur-containing heterocycles. In particular, divergent benzoheteroles are efficiently prepared in a simple manner by thiolation of ethynylbenzenes bearing ortho-nucleophilic functional groups followed by iodocyclization.
Alkyne Activation in the Diversity Oriented Synthesis of sp
<sup>2</sup>
‐Rich Scaffolds: A Biased Library Approach for Targeting Polynucleotides (DNA/RNA)
作者:Shuqi Chen、Daniel L. Priebbenow、Julie Somkhit、Carmen V. Scullino、Keli Agama、Yves Pommier、Bernard L. Flynn
DOI:10.1002/chem.202201925
日期:2022.12.20
The targeting of polynucleotide (RNA and DNA) topologies and their protein complexes by small molecules has enormous potential in the discovery of new therapeutics across a broad range of diseases (infectious, chronic and congenital). Polynucleotides are very differentstructures to proteins and have a much greater capacity to form strong π,π-interactions with suitably π-rich small molecules. To exploit
Synthesis of benzothiophene derivatives from dilithio reagents, sulfur, and electrophiles via electrophilic cyclization
作者:Zitao Wang、Weizhi Geng、Hanliu Wang、Shaoguang Zhang、Wen-Xiong Zhang、Zhenfeng Xi
DOI:10.1016/j.tetlet.2011.10.098
日期:2011.12
Benzothiophene derivatives were synthesized in high yields from readily available o-(alkynyllithio)aryllithio compounds, sulfur, and 2 equiv of acid chlorides or other electrophiles. An acid chloride-induced electrophilic cyclization resulted in the formation of the thiophene ring. (C) 2011 Elsevier Ltd. All rights reserved.
COMPOUND COLLECTIONS, COMPOUNDS AND SYNTHESIS THEREOF
申请人:[en]MONASH UNIVERSITY
公开号:WO2024044825A1
公开(公告)日:2024-03-07
Provided herein are collections of compounds of formula a) to u), and salts thereof, which have polycyclic aromatic scaffolds and thus have structures targeted towards binding polynucleotide therapeutic targets, including polynucleotide-protein complexes. Also provided are compounds and salts themselves, methods of synthesizing such compounds, methods of identifying compounds having activity against a polynucleotide target, use of the compounds as reference compounds in assays, and phenotypic methods of identifying a new polynucleotide target using the compounds.