5-羟甲基糠醛(HMF)催化转化为呋喃-2,5-二甲基羧酸酯(FDMC)在生产聚乙烯呋喃酸酯(PEF)中具有重要意义。 )。在这里,我们首次报道了使用嵌入过氧化氢的介孔氧化铝纳米球(CuO / m-Al)将过氧化叔丁基过氧化氢(TBHP)作为氧化和甲基化试剂,由HMF的氧化甲基酯化合成FDMC。2 O 3)。CuO / m-Al 2 O 3通过蒸发诱导的结构导向剂(Pluronic P-123)自组装制备了具有不同铜含量的催化剂。在空气中煅烧过程中P-123的分解导致形成具有高度分散的CuO纳米粒子的中孔结构。所制备的6-CuO / m-Al 2 O 3表现出对HMF氧化成FDMC的氧化甲基酯化的优异催化活性,产率为92%,转换频率(TOF)为0.56 h -1。此外,还已经证明了使用相同的催化剂通过SP 3 C H键官能化对多种底物进行氧化甲基酯化。
<i>N</i>-Hydroxybenzimidazole Inhibitors of the Transcription Factor LcrF in <i>Yersinia</i>: Novel Antivirulence Agents
作者:Oak K. Kim、Lynne K. Garrity-Ryan、Victoria J. Bartlett、Mark C. Grier、Atul K. Verma、Gabriel Medjanis、Janice E. Donatelli、Ann B. Macone、S. Ken Tanaka、Stuart B. Levy、Michael N. Alekshun
DOI:10.1021/jm9006577
日期:2009.9.24
LcrF, a multiple adaptational response (MAR) transcription factor, regulates virulence in Yersinia pestis and Yersinia pseudotuberculosis. In a search for small molecule inhibitors of LcrF, an acrylic amide series of N-hydroxybenzimidazoles was synthesized and the SAR (structure-activity relationship) was examined, Selected test compounds demonstrated inhibitory activity in a primary cell-free LcrF-DNA binding assay as well as in a secondary whole cell assay (type III secretion system dependent Y. pseudotuberculosis cytotoxicity assay). The inhibitors exhibited no measurable antibacterial activity in vitro, confirming that they do not target bacterial growth. These results demonstrate that N-hydroxy-benzimidazole inhibitors, exemplified by 14, 22, and 36, are effective antivirulence agents and have the potential to prevent infections caused by Yersinia spp.
[EN] OXIDATION DYEING PROCESS USING A COMPOSITION COMPRISING A MONOAMINOBENZENE AND A METAL CATALYST<br/>[FR] PROCÉDÉ DE COLORATION PAR OXYDATION À L'AIDE D'UNE COMPOSITION COMPRENANT UN MONOAMINOBENZÈNE ET UN CATALYSEUR MÉTALLIQUE
申请人:OREAL
公开号:WO2014202787A1
公开(公告)日:2014-12-24
The invention relates to a process for dyeing keratin fibres, comprising the use of one or more metal catalysts and o f a composition (A) comprising : - one or more oxidizing agents, and - at least one monoaminobenzene of formula (I), or an addition salt or solvate thereof in which the radicals R1 to R5 represent, independently of each other: a hydrogen atom; a halogen atom, a C1-C6 alkyl radical, a C1-C6 alkoxy radical, a carboxylic radical (-COOH), a sulfonic radical (-S03 H); two of the adjacent radicals R1 to R5 possibly forming, with the carbon atoms that bear them, a saturated or unsaturated 5- to 7-membered ring, optionally comprising from 1 to 2 heteroatoms, preferably oxygen, the said ring being optionally fused with a saturated or unsaturated 5- to 6- membered ring; on condition that at least one of the radicals R1 to R5 represents an optionally substituted alkoxy radical and preferably at least one of the other radicals R1 to R5 is a hydrogen atom.
WO2006/101318
申请人:——
公开号:——
公开(公告)日:——
Copper-catalyzed oxidative methyl-esterification of 5-hydroxymethylfurfural using TBHP as an oxidizing and methylating reagent: A new approach for the synthesis of furan-2,5-dimethylcarboxylate
作者:Shyam Sunder R. Gupta、Ajayan Vinu、Mannepalli Lakshmi Kantam
DOI:10.1016/j.jcat.2020.05.032
日期:2020.9
biomass-derived polymer that can replace the fossil dependent polyethylene terephthalate (PET). Herein, for the first time, we report the synthesis of FDMC from oxidative methyl-esterification of HMF using tert-butyl hydroperoxide (TBHP) as an oxidizing and methylating reagent catalyzed by mesoporous alumina nanospheres-embedded with CuO nanoparticles (CuO/m-Al2O3). The CuO/m-Al2O3 catalysts with different
5-羟甲基糠醛(HMF)催化转化为呋喃-2,5-二甲基羧酸酯(FDMC)在生产聚乙烯呋喃酸酯(PEF)中具有重要意义。 )。在这里,我们首次报道了使用嵌入过氧化氢的介孔氧化铝纳米球(CuO / m-Al)将过氧化叔丁基过氧化氢(TBHP)作为氧化和甲基化试剂,由HMF的氧化甲基酯化合成FDMC。2 O 3)。CuO / m-Al 2 O 3通过蒸发诱导的结构导向剂(Pluronic P-123)自组装制备了具有不同铜含量的催化剂。在空气中煅烧过程中P-123的分解导致形成具有高度分散的CuO纳米粒子的中孔结构。所制备的6-CuO / m-Al 2 O 3表现出对HMF氧化成FDMC的氧化甲基酯化的优异催化活性,产率为92%,转换频率(TOF)为0.56 h -1。此外,还已经证明了使用相同的催化剂通过SP 3 C H键官能化对多种底物进行氧化甲基酯化。