ChemInform Abstract: ortho-Quinone Methide Imine: Generation and Diels-Alder Reaction at Room Temperaturecycloaddition reactionsquinoline derivativesfused pyridine derivativesChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals....
Biomimetic eplone via ortho-quinonemethide methide oxidopyrilium cycloadd to tropoloneBaldwin, J E
calculations show that the reaction involves the formation of a duplex vinylidene-quinone methide (VQM) intermediate and two successive cycloaddition reactions... S Huang,H Wen,Y Li,... - 《Nature Communications》 被引量: 0发表: 0年 Organocatalytic Asymmetric Domino Michael/Acyl Transfer Reaction...
The first metal‐catalyzed C3‐nucleophilic (4+3) cyclization of 2‐indolylmethanols with stable ortho‐quinone methides has been established, which constructed indole‐based seven‐membered heterocycles in high yields (70 %‐98 %) with regiospecificity. This reaction has tackled the challenges ...
0 (Indolequinones) 138230-21-4 (quinone methide) 70FD1KFU70 (Sulfur) 7440-44-0 (Carbon) PreMedline Identifier: 36121104From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.Printer-Friendly Download Thisprocessing...Find...
. Furthermore, the deuterium-labeling experiments and high-resolution mass spectroscopy demonstrated that a vinylidene ortho-quinone methide intermediate was involved and possibly resulted from a prototropic rearrangement of 2-ethynylphenol. Remarkably, a catalyst loading as low as 0.1 mol %, ...
Even though quinone may be the initial product of the reaction, it rapidly and instantaneously isomerized to a tautomeric quinone methide imine amide that exhibited rapid intramolecular cyclization generating dihydroxy coumarin derivative (see the next section; Figure 13). Figure 13. Intramolecular ...
From the analysis of these descriptors, we see that the ω of orthoquinones are higher than the ω of quinonemethide triterpenoids and phenolic triterpenoids and the N of orthoquinones are lower than the N of the quinone and phenolic systems. In addition, the μ of orthoquinones is lower ...
In this highlight, we would like to describe our recent development of a new bioorthogonal ligation enabled by the click cycloaddition of ortho-quinolinone quinone methide (oQQM) and vinyl thioether (VT). 展开 关键词: Bioorthogonal ligation ortho-quinone methide vinyl thioether chemical genetic ...
Front Cover Picture: Gold‐Catalyzed Synthesis of Ortho‐Quinone Methide Analogues as Reactive Synthetic Precursors (Adv. Synth. Catal. 10/2024)The front cover illustrates pandas as gold catalysts on trees, with the leaves symbolizing reaction reagents, intermediates, and products. It portrays the ...