Reductive desymmetrization of 2,2-disubstituted-1,3-diketones to β-hydroxy ketones under metal catalysis has been mainly performed by Corey-Bakshi-Shibata monoreduction with catecolborane using a chiral oxazaborylidine as catalyst and by an asymmetric transfer hydrogenation catalyzed by Ru, Ir and...
1,3-DiketoneOil-soluble additivesFriction reductionExtreme pressure capacityWith the growing demand in both lubrication performance and environmental protection, it is eager to seek novel lubricant additives of good oil miscibility and high tribological efficiency but without harmful elements such as sulfur...
3, Beatriz Moreira4, Svetlana Sudakova1, Sergey Podyachev1, Alfia Fattakhova2, Gulnara Safina4,5, Ingemar Lundstrom6,7, Aidar Gubaidullin1 & Alberto Vomiero6 Polyelectrolyte-coated nanoparticles consisting of terbium and gadolinium complexes with calix[4] arene tetra-diketone ...
Polyelectrolyte-coated nanoparticles consisting of terbium and gadolinium complexes with calix[4]arene tetra-diketone ligand were first synthesized. The antenna effect of the ligand on Tb(III) green luminescence and the presence of water molecules in the coordination sphere of Gd(III) bring strong lum...
The direct reduction by LiAlH of a suspension of anhydrous sodium ; acetate in tetrahydrofurferyloxytetrahydropyran is described. This study has ; shown that the ethanol thus obtained is impure and that the yields are erratic. ; On the contrary the reduction of acetyl chloride 1-C by LiAlH ...
and after washing with chloroform (wChHicChli3n) calnuddedsraylidneghaytdteh(e1a mmmbioeln),t temperature, and then can be reused for the synthesis of 1,3-diketone (4-hydroxycoumarin, dimedone), (1 mmol), DHPC and THBP, and malononitrile (1.5 mmol) under optimized conditions....
This particular diketone is used as a building block in the synthesis of more complex molecules.5. MSDS2.Hazard identification 2.1 Classification of the substance or mixture Not classified. 2.2 GHS label elements, including precautionary statements Pictogram(s) No symbol. Signal word No signal ...
Kim MS, Hashemi SB, Spencer PS et al (2002) Amino acid and protein targets of 1,2-diacetylbenzene, a potent aromatic gamma-diketone that induces proximal neurofilamentous axonopathy. Toxicol Appl Pharmacol 183:55–65. https://doi.org/10.1006/taap.2002.9456 Article CAS PubMed Google Scholar ...
When the 1,3-diketone dimedone (Scheme 13, Path B) was reacted with aliphatic and aromatic α,β-unsaturated aldehydes, the corresponding chromenones were obtained with yields in the range of 48–89% and enantioselectivities of up to 96% ee using 10 or 20 mol % of 13a ...
One of them, 1,3-diphenyl-1,3-bis(diphenylphosphino)propane, could be advantageously utilized as a ligand for the efficient enantioselective Ru-catalyzed hydrogenation of its own 1,3-diketone precursor. Thus, the condition for a ‘cross self-breeding’ catalytic system is fulfilled. A further ...