Application and developing of iron‐doped multi‐walled carbon nanotubes (Fe/MWCNTs) as an efficient and reusable heterogeneous nanocatalyst in the synthesis of heterocyclic compounds
Iron‐dopedmulti‐walledcarbonnanotubes (Fe/MWCNTs) is an efficient, ecofriendly and reusableheterogeneousnanocatalyst for the one‐pot synthesis of heterocycliccompounds including bis‐spiro piperidines, piperidines, dihydro‐2‐oxopyrroles, pyrazoles and diazepines at room temperature with good to excellent yields. The heterogeneousnanocatalyst was fully characterized by scanning electron microscopy
铁掺杂的多壁碳纳米管(Fe / MWCNTs)是一种高效,生态友好且可重复使用的多相纳米催化剂,用于在室温下单锅合成杂环化合物,包括双螺哌啶,哌啶,二氢-2-氧吡咯,吡唑和二氮杂s温度高到极好的产量。通过扫描电子显微镜(SEM),X射线衍射(XRD),电感耦合等离子体(ICP)和FT-IR分析充分表征了多相纳米催化剂。同样,所有制备的化合物的结构均通过1 H NMR表征,13C NMR,FT-IR,质谱(MS)和元素分析。这些规程的主要优点是温和且绿色的反应条件,较短的反应时间,清洁的反应,操作简单,易于纯化以及可重复使用的多相纳米催化剂的产率高至优异。将该催化剂循环十次而活性没有明显损失。
Asymmetric Organocatalytic Synthesis of Substituted Chiral 1,4-Dihydropyridine Derivatives
作者:Fernando Auria-Luna、Eugenia Marqués-López、M. Concepción Gimeno、Roghayeh Heiran、Somayeh Mohammadi、Raquel P. Herrera
DOI:10.1021/acs.joc.7b00176
日期:2017.6.2
anocatalyzed enantioselective synthesis of chiral 1,4-dihydropyridine derivatives is described. Bis-cinchona catalyst 3b activates the Michael addition reaction between malononitrile derivatives 2 and enamines 1, affording the appealing and highly substituted 1,4-dihydropyridines 4 with very good results in most cases. This is one of very few examples of the synthesis of chiral 1,4-dihydropyridines
Quinolinone derivatives can be obtained in microwave-assisted syntheses by reaction of anilinederivatives with acetylene dicarboxylic esters, a malonicacid diester or β-keto ester derivatives. The reaction proceeds under mild conditions in short reaction times. Two of the quinolinones were transformed into the corresponding 4-chloroquinolines either by conventional heating or in a microwave-assisted
通过苯胺衍生物与乙炔二羧酸酯、丙二酸二酯或β-酮酯衍生物的反应,可以在微波辅助合成中获得喹啉酮衍生物。该反应在温和的条件下在很短的反应时间内进行。通过常规加热或在微波辅助反应中,两种喹啉酮被转化为相应的 4-氯喹啉。进一步的修改导致硼加合物或附聚物的形成。后者通过 X 射线晶体结构分析表征。
Efficient Synthesis of the Functionalized Spiro[indoline‐3,4′‐pyridine] via Four‐component Reaction
作者:Jing Sun、Qun Wu、Lijuan Zhang、Chaoguo Yan
DOI:10.1002/cjoc.201100657
日期:2012.7
An efficient synthetic procedure for the functionalizedspiro[indoline‐3,4′‐pyridine] was developed via the four‐componentreactions of arylamines, acetylenedicarboxylates, isatins and malononitrile with triethylamine as the base catalyst. The advantages of this reaction are using common starting material, mild reaction conditions, broad scope of reactants and operational simplicity.
Trifluoroaceticacid was applied as an efficient catalyst for the one-pot four-component synthesis of N-aryl/alkyl-3-aminodihydropyrrol-2-one-4-carboxylates via the domino reaction of amines, formaldehyde and dialkyl acetylenedicarboxylates at ambient temperature in methanol. This methodology includes number of advantages such as: short reaction time, clean work-up, use of inexpensive catalyst, high