Functionalized Cyclopentenones and an Oxime Ether as Antimicrobial Agents
作者:Rafael F. A. Gomes、Vera M. S. Isca、Késsia Andrade、Patrícia Rijo、Carlos A. M. Afonso
DOI:10.1002/cmdc.202100369
日期:2021.9.16
naturally occurring cyclopentenones, such as palmenones and nigrosporiones, exhibit antimicrobial activity. Herein we describe the antimicrobial activity of cyclopentenones and derivatives that can be easily accessed from biomass derivatives furfural and 5-hydroxymethylfurfural. Upon screening a range of functionalized trans-diamino-cyclopentenones (DCPs) and δ-lactone-fused cyclopentenones (LCPs), an oxime
Synthesis of 2,4-bifunctionalised cyclopentenones from 2-furaldehyde
作者:João P. M. Nunes、Carlos A. M. Afonso、Stephen Caddick
DOI:10.1039/c3ra42663g
日期:——
Herein we report a new approach to the synthesis of 2,4-bifunctionalised cyclopentenones via one-pot conversion of 2-furaldehyde with morpholine followed by concomitant 1,4 addition and elimination. This protocol has also been extended to afford 2-hydroxy, 2-amino and 2-phenyl cyclopentenones.
Efficient Ni<sup>II</sup><sub>2</sub>Ln<sup>III</sup><sub>2</sub> Electrocyclization Catalysts for the Synthesis of <i>trans</i>-4,5-Diaminocyclopent-2-enones from 2-Furaldehyde and Primary or Secondary Amines
作者:Kieran Griffiths、Prashant Kumar、James D. Mattock、Alaa Abdul-Sada、Mateusz B. Pitak、Simon J. Coles、Oscar Navarro、Alfredo Vargas、George E. Kostakis
DOI:10.1021/acs.inorgchem.6b00720
日期:2016.7.18
(1Tb)] were synthesized by the reaction of (E)-2-(2-hydroxy-3-methoxybenzylidene-amino)phenol) (H2L1) with NiCl2·6(H2O) and LnCl3·x(H2O) in the presence of Et3N at room temperature. These air-stable CCs can be obtained in very high yields from commercially available materials and are efficient catalysts for the room-temperature domino ring-opening electrocyclization synthesis of trans-4,5-diaminocyclopent-2-enones
Solvent-Free Synthesis and Key Intermediate Isolation in Ni<sub>2</sub>Dy<sub>2</sub> Catalyst Development in the Domino Ring-Opening Electrocyclization Reaction of Furfural and Amines
作者:Stavroula I. Sampani、Andrew McGown、Alfredo Vargas、Alaa Abdul-Sada、Graham J. Tizzard、Simon J. Coles、John Spencer、George E. Kostakis
DOI:10.1021/acs.joc.9b00608
日期:2019.6.7
A solvent-free methodology that yields trans-4,5-diaminocyclopent-2-enones, main domains of natural products and a variety of N-heterocycles, is described. The bimetallic catalyst [NiII2DyIII2L4(DMF)6] 2(OTf) 2(DMF) (1) promotes the domino reaction of furfural and amines, with loadings as low as 0.01%, under stirring or microwave-assisted conditions to afford the corresponding frameworks in very good
描述了产生反式-4,5-二氨基环戊-2-烯酮,天然产物的主要结构域和各种N-杂环的无溶剂方法。双金属催化剂[Ni II 2 Dy III 2 L 4(DMF)6 ] 2(OTf)2(DMF)(1)在搅拌或微波作用下可促进糠醛和胺的多米诺反应,负载量低至0.01%。辅助条件,以非常好的至极好的产量提供相应的构架。晶体学和理论研究揭示了反式-非对映异构体是通过4π-旋转电环化过程形成的唯一分子,阐明了催化过程中的关键步骤。
Polyoxometalate-Driven Ease Conversion of Valuable Furfural to <i>trans</i>-<i>N</i>,<i>N</i>-4,5-Diaminocyclopenten-2-ones
作者:Marina A. Tzani、Stella Fountoulaki、Ioannis N. Lykakis
DOI:10.1021/acs.joc.1c02550
日期:2022.3.4
efficacy of silicotungstic acid (H4SiW12O40) polyoxometalate (POM) toward the reaction between furfural and amines that selectively yields trans-N,N-4,5-substituted-diaminocyclopenten-2-ones (trans-DACPs). H4SiW12O40 facilitates the synthesis of a library of trans-DACPs with loadings as low as 0.05 mol %, in open air, without additives, in short times and good to high isolated yields. The protocol was applied
我们研究了硅钨酸 (H 4 SiW 12 O 40 ) 多金属氧酸盐 (POM) 对糠醛和胺之间反应的催化效果,该反应选择性地产生反式- N , N -4,5-取代二氨基环戊烯-2-酮 ( trans - DACP)。H 4 SiW 12 O 40促进反式-DACP 库的合成,其负载量低至0.05 mol%,在露天,无添加剂,在短时间内和良好的高分离产率。该方案适用于仲胺以及具有 p K b的芳族伯胺高于约 9. 目前的催化合成方案具有扩展的底物范围和高产率,据我们所知,它代表了第一个多金属氧酸盐驱动的范例,作为在温和反应条件下生产环戊酮框架的有效方法。