Efficient synthesis of pyrrolo[1,2-a]quinoxalines catalyzed by a Brønsted acid through cleavage of C–C bonds
作者:Caixia Xie、Lei Feng、Wanli Li、Xiaojun Ma、Xinkun Ma、Yihan Liu、Chen Ma
DOI:10.1039/c6ob01401a
日期:——
An efficient and convenient one-pot domino reaction for the direct synthesis of pyrrolo[1,2-a]quinoxalines has been developed. This approach utilizes an imine formation reaction, SEAr reaction and cleavage of C–C bonds catalyzed by a Brønsted acid. β-Diketones and β-keto esters are both well tolerated to give the corresponding products in moderate to excellent yields.
已经开发了用于直接合成吡咯并[1,2- a ]喹喔啉的有效且方便的一锅多米诺反应。该方法利用用于形成亚胺的反应,S È氩反应和裂解由布朗斯台德酸催化的C-C键。β-二酮和β-酮酯均具有良好的耐受性,可以以中等至极好的收率得到相应的产物。
Pyrrolo[1,2‐
<i>a</i>
]quinoxalines: Insulin Mimetics that Exhibit Potent and Selective Inhibition against Protein Tyrosine Phosphatase 1B
作者:Javier García‐Marín、Mercedes Griera、Patricia Sánchez‐Alonso、Bruno Di Geronimo、Francisco Mendicuti、Manuel Rodríguez‐Puyol、Ramón Alajarín、Beatriz Pascual‐Teresa、Juan J. Vaquero、Diego Rodríguez‐Puyol
DOI:10.1002/cmdc.202000446
日期:2020.10.5
analogues bearing chlorine atoms at C7 and/or C8 kept potency and showed good selectivity compared to TCPTP (selectivity index >40). The most potent inhibitors behaved as insulin mimetics by increasing glucose uptake. The 4‐benzyl derivative inhibited insulin receptor substrate 1 and AKT phosphorylation. Molecular docking and molecular dynamics simulations supported a putative binding mode for these compounds
A practical and concise protocol for the efficient preparation of pyrrolo[1,2-a]quinoxalines through a cascade of alcohol oxidation/imine formation/intramolecular cyclization/oxidative dehydrogenation has been established. A series of substituted pyrrolo[1,2-a]quinoxaline derivatives were constructed readily in yields of 53–93% from the cheap primary alcohols by using dioxygen as the terminal oxidant
已经建立了通过级联的醇氧化/亚胺形成/分子内环化/氧化脱氢有效制备吡咯并[1,2- a ]喹喔啉的实用而简洁的方案。通过使用双氧作为末端氧化剂,可以很容易地从廉价的伯醇中制备出一系列取代的吡咯并[1,2- a ]喹喔啉衍生物,产率为53-93%。值得注意的是,无需额外的金属和添加剂这一事实使得这种前所未有的需氧氧化工艺在步骤和原子经济上都非常经济。在标准条件下,用克级合成化合物3aa进一步证明了这种转化的有用性。
Crafting mono- and novel bis-methylated pyrroloquinoxaline derivatives from a shared precursor and its application in the total synthesis of marinoquinoline A
The synthesis of mono- and novel bis-methylated pyrrolo[1,2-a]quinoxalines through the addition of unstable methyl radicals to aryl isocyanides is described contingent upon the reaction conditions employed. The strategy has been effectively employed in the total synthesis of the natural product marinoquinoline A.
描述了根据所采用的反应条件,通过将不稳定的甲基自由基加成至芳基异氰化物来合成单甲基化和新型双甲基化吡咯并[1,2- a ]喹喔啉。该策略已有效地应用于天然产物马林喹啉A的全合成。
作者:Zhiguo Zhang、Junlong Li、Guisheng Zhang、Nana Ma、Qingfeng Liu、Tongxin Liu
DOI:10.1021/acs.joc.5b00915
日期:2015.7.2
An efficient and convenient iron-catalyzed protocol has been developed for the synthesis of substituted pyrrolo[1,2-a]quinoxalines from 1-(N-arylpyrrol-2-yl)ethanone O-acetyl oximes through N-O bond cleavage and intramolecular directed C-H arylation reactions in acetic acid.