1756-31-6Relevant articles and documents
Chemical Consequences of the Mechanical Bond: A Tandem Active Template-Rearrangement Reaction
Modicom, Florian,Jamieson, Ellen M. G.,Rochette, Elise,Goldup, Stephen M.
supporting information, p. 3875 - 3879 (2019/02/24)
We report the unexpected discovery of a tandem active template CuAAC-rearrangement process, in which N2 is extruded on the way to the 1,2,3-triazole product to give instead acrylamide rotaxanes. Mechanistic investigations suggest this process i
Tropylium Ion Catalyzes Hydration Reactions of Alkynes
Oss, Giulia,Ho, Junming,Nguyen, Thanh Vinh
supporting information, p. 3974 - 3981 (2018/08/17)
The hydration of alkynes is one of the most atom-economic and versatile synthetic protocols to access carbonyl compounds. This fundamental reaction, however, often requires transition-metal catalysts or harsh reaction conditions to promote the addition of water to the carbon–carbon triple bond. In this work, it is demonstrated that the non-benzenoid aromatic tropylium ion can be used as an organic Lewis acid promoter for the hydration of alkynes under simple reaction conditions with excellent outcomes.
Organoiridium complex for organic electroluminescent elements
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Page/Page column 22; 23, (2018/02/02)
The present invention provides an organometallic complex having a high quantum efficiency even in a polymer thin film as a emitting material for organic electroluminescent (EL) element. The present invention relates to an organoiridium complex for an organic electroluminescent element represented by the following Formula; wherein a C—N ligand including two atomic groups (A1, A2), and a β-diketone ligand in line symmetry having two tert-butyl-substituted phenyl groups are coordinated with an iridium atom. The organoiridium complex of the present invention has a high quantum efficiency even in a polymer thin film with respect to green to yellow electroluminescence. (In the aforementioned Formula, R1, R2, and R3 are each a tert-butyl group or a hydrogen atom, and have at least one tert-butyl group; they may bond each other to thereby form a saturated hydrocarbon ring, when having two tert-butyl groups; A1, A2 are each an unsaturated hydrocarbon ring, at least one is a single ring, and at least one is a heterocyclic ring).
ORGANIC IRIDIUM COMPLEX FOR ORGANIC ELECTROLUMINESCENCE ELEMENT
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Paragraph 0036, (2016/12/01)
A metallo-organic complex, which can realize an electroluminescence of high quantum efficiency and has high heat resistance as a luminescence material for an organic electroluminescence (EL) element. More particularly, an organic iridium complex for an organic EL element, wherein a C-N ligand having a substituent group of three-ring structure in which a hetero ring and two benzene rings are ring-fused and a β-diketone ligand including a propane-1,3-dione having two tert-butyl-substituted phenyl groups are coordinated with an indium atom. The present complex has a high heat resistance enough to contribute to increase in long service life of an organic EL element
4-PHENYL-1,3-THIAZOLES AND 4-PHENYL-1,3-OXAZOLES DERIVATIVES AS CANNABINOID RECEPTOR LIGANDS
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, (2011/04/18)
The present invention relates to new 4-phenyl-1,3-azole derivatives having the general formula (I) wherein R1, R2, R3, R4, X, A, B, and n are variable, in a racemic form, an enantiomeric form or any combinations thereof. These compounds exhibit affinity f
Design, synthesis and biological evaluation of nuclear receptor-degradation inducers
Itoh, Yukihiro,Kitaguchi, Risa,Ishikawa, Minoru,Naito, Mikihiko,Hashimoto, Yuichi
experimental part, p. 6768 - 6778 (2012/01/13)
Compounds that regulate the function(s) of nuclear receptors (NRs) are useful for biological studies and as candidate therapeutic agents. Most such compounds are agonists or antagonists. On the other hand, we have developed specific protein degradation in
Inhibition of protein kinase C-driven nuclear factor-κB activation: Synthesis, structure-activity relationship, and pharmacological profiling of pathway specific benzimidazole probe molecules
Peddibhotla, Satyamaheshwar,Shi, Ranxin,Khan, Pasha,Smith, Layton H.,Mangravita-Novo, Arianna,Vicchiarelli, Michael,Su, Ying,Okolotowicz, Karl J.,Cashman, John R.,Reed, John C.,Roth, Gregory P.
supporting information; experimental part, p. 4793 - 4797 (2010/10/19)
A unique series of biologically active chemical probes that selectively inhibit NF-κB activation induced by protein kinase C (PKC) pathway activators have been identified through a cell-based phenotypic reporter gene assay. These 2-aminobenzimidazoles represent initial chemical tools to be used in gaining further understanding on the cellular mechanisms driven by B and T cell antigen receptors. Starting from the founding member of this chemical series 1a (notated in PubChem as CID-2858522), we report the chemical synthesis, SAR studies, and pharmacological profiling of this pathway-selective inhibitor of NF-κB activation.
The palladium-catalyzed aerobic kinetic resolution of secondary alcohols: Reaction development, scope, and applications
Ebner, David C.,Bagdanoff, Jeffrey T.,Ferreira, Eric M.,McFadden, Ryan M.,Caspi, Daniel D.,Trend, Raissa M.,Stoltz, Brian M.
supporting information; experimental part, p. 12978 - 12992 (2010/06/19)
The first palladium-catalyzed enantioselective oxidation of secondary alcohols has been developed, utilizing the readily available diamine (-)-sparteine as a chiral ligand and molecular oxygen as the stoichiometric oxidant. Mechanistic insights regarding the role of the base and hydrogen-bond donors have resulted in several improvements to the original system. Namely, addition of cesium carbonate and tert-butyl alcohol greatly enhances reaction rates, promoting rapid resolutions. The use of chloroform as solvent allows the use of ambient air as the terminal oxidant at 23°C, resulting in enhanced catalyst selectivity. These improved reaction conditions have permitted the successful kinetic resolution of benzylic, allylic, and cyclopropyl secondary alcohols to high enantiomeric excess with good-toexcellent selectivity factors. This catalyst system has also been applied to the desymmetrization of meso-diols, providing high yields of enantioenriched hydroxyketones.
THIAZOLE DERIVATIVES AS CXCR3 RECEPTOR MODULATORS
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Page/Page column 57-58, (2008/06/13)
The invention encompasses compounds of Formula I (I) or pharmaceutically acceptable salts thereof, which are antagonist of the CXCR3 chemokine receptor useful for the treatment or prevention of pathogenic inflammatory processes, autoimmune diseases or graft rejection processes. Methods of use and pharmaceutical compositions are also encompassed.
Novel anti-Markovnikov regioselectivity in the Wacker reaction of styrenes
Wright, Joseph A.,Gaunt, Matthew J.,Spencer, Jonathan B.
, p. 949 - 955 (2007/10/03)
The Wacker reaction is one of the longest known palladium-catalysed organic transformations, and in the vast majority of cases proceeds with Markovnikov regioselectivity. Palladium(II)-mediated oxidation of styrenes was examined and in the absence of reoxidants was found to proceed in an anti-Markovnikov sense, giving aldehydes. Studies on the mechanism of this unusual transformation were carried out, and indicate the possible involvement of a η4-palladium-styrene complex. With a heteropolyacid as the terminal oxidant, oxidation of styrene to give the anti-Markovnikov aldehyde as the major product was found to be catalytic.
