Electrophilic substitution reactions of trisheteroarylmethanes: an efficient strategy to develop novel synthons for organic synthesis
摘要:
Trisheteroarylmethanes are interesting molecules for the construction of three dimensionally complex systems. From this vantage point, we studied electrophilic substitution reactions on tris-2-thienylmethane and tris-2-furylmethane. During the bromination reaction, we have isolated the tris-bromosubstituted tris-2-thienylmethane in the former case and brominated furanones in the latter case, which may be of synthetic and biological importance. (c) 2005 Elsevier Ltd. All rights reserved.
A two-phase system for the clean and high yield synthesis of furylmethane derivatives over –SO<sub>3</sub>H functionalized ionic liquids
作者:S. H. Shinde、C. V. Rode
DOI:10.1039/c7gc01654a
日期:——
respective ionic liquids. Among the several preapered ionic liquids, strong acidic imidazolium based butylsulfonic acid (6) showed the best activity with a maximum of 84% yield of condensation product. This strategy offers significantly highyield production of condensation products of furan and furfural as compared to the traditional mineral acid route. The activity and stability of the -SO3H functionalized
The reaction of N-tosyl imines with heteroaromatic compounds: a new access to triheteroarylmethanes
作者:Baris Temelli、Dilek Isik Tasgin、Canan Unaleroglu
DOI:10.1016/j.tet.2010.06.070
日期:2010.8
Useful triheteroarylmethanes were prepared by the double Friedel–Crafts reaction of a wide variety of aromatic N-tosyl imines with furan, thiophene, and pyrrole in the presence of Cu(OTf)2 and Montmorillonite K-10 clay catalysts.
Catalytic C-C coupling of furanic platform chemicals to high carbon fuel precursors over supported ionic liquids
作者:Mahlet N. Gebresillase、Jeong Gil Seo
DOI:10.1016/j.apcata.2021.118421
日期:2021.11
(FS) by using alkyl chains as a linker. The prepared catalysts were applied for the C-Ccouplingreactions of 2-methylfuran (2-MF) with levulinic acid (LA), angelica lactone (AL), and ethyl levulinate (EL) to synthesize high carbon fuel precursors. The hydrophilic nature of FS supported IL catalyst having bisulfate anion was suitable for the self C-Ccouplingreaction of 2-MF and the reaction of 2-MF
具有不同阴离子(Cl -、HSO 4 -和CF 3 SO 3 -)的咪唑基离子液体(IL)催化剂通过使用烷基链作为连接体共价锚定到纤维状二氧化硅(FS)的表面。制备的催化剂用于2-甲基呋喃(2-MF)与乙酰丙酸(LA)、当归内酯(AL)和乙酰丙酸乙酯(EL)的CC偶联反应合成高碳燃料前体。具有硫酸氢根阴离子的FS负载IL催化剂的亲水性适用于2-MF的自CC偶联反应和2-MF与LA的反应。具有三氟甲磺酸根阴离子的FS负载的IL催化剂(FS-ILCF 3 SO 3) 对来自 2-MF 与 AL 和 EL 的 CC 偶联反应的目标燃料前体表现出高转化率和选择性。FS-ILHSO 4和FS-ILCF 3 SO 3增加的溶解度、可调酸度和亲水性/疏水性保证了可持续的催化剂系统。支持的 IL 使转化过程更环保、更高效,以大规模生产生物质衍生燃料前体。
CC Bond Formation Reactions for Biomass-Derived Molecules
作者:Ayyagari V. Subrahmanyam、Sankaran Thayumanavan、George W. Huber
DOI:10.1002/cssc.201000136
日期:2010.10.25
to 15 carbons in length) from the major building blocks of biomass, which are carbohydrates of typically 5 or 6 carbons in length, there must be a CCbondformation from the biomass‐derived molecules. Chemical routes that can be employed to create CC bonds from biomass‐derived feedstocks are provided.
MOF-catalyzed hydroxyalkylation-alkylation reaction for the controlled synthesis of furan oligomers
作者:Eduardo C. Atayde、Babasaheb M. Matsagar、Yu-Cheng Wang、Kevin C.-W. Wu
DOI:10.1016/j.apcata.2023.119492
日期:2024.1
Hydroxyalkylation-alkylation (HAA) reaction is a type of C-C coupling technique utilized in the production of furan oligomers, which are potential biofuel precursors. In this study, we present the first application of an acidic MOF, Sulfated MOF-808, in catalyzing the HAA reactions of a series of furan oligomers with high yield and selectivity. Specifically, we focused on the optimization of the HAA
羟烷基化-烷基化 (HAA) 反应是一种 CC 偶联技术,用于生产呋喃低聚物,呋喃低聚物是潜在的生物燃料前体。在这项研究中,我们首次将酸性 MOF(硫酸化 MOF-808)应用于催化一系列呋喃低聚物的 HAA 反应,并具有高产率和选择性。具体来说,我们通过改变不同的反应条件,重点优化了5-甲基糠醛(5-MFUR)和2-甲基呋喃(2-MF)之间的HAA,其定量收率达到97%,同时防止了2的自缩合。 -MF。该催化剂还被发现是可回收的,并且可以重复使用而不会显着损失其活性。最后,我们扩展了底物范围,将苯基亲电子试剂纳入其中,从而进一步证明了硫酸化MOF-808催化剂在多种起始材料的HAA反应中的多功能性。