[EN] METHOD FOR PRODUCING 4-HYDROXYBUTYL ALDEHYDE, METHOD FOR PRODUCING GAMMA BUTYROLACTONE, METHOD FOR PRODUCING N-METHYL-2-PYRROLIDONE, AND COMPOUND [FR] PROCÉDÉ DE PRODUCTION D'ALDÉHYDE 4-HYDROXYBUTYLE, PROCÉDÉ DE PRODUCTION DE GAMMA BUTYROLACTONE, PROCÉDÉ DE PRODUCTION DE N-MÉTHYL-2-PYRROLIDONE ET COMPOSÉ [JA] 4-ヒドロキシブチルアルデヒドの製造方法、ガンマブチロラクトンの製造方法、N-メチル-2-ピロリドンの製造方法、化合物
Wide-Bite-Angle Diphosphine Ligands in Thermally Activated Delayed Fluorescent Copper(I) Complexes: Impact on the Performance of Electroluminescence Applications
作者:Chenfei Li、Campbell F. R. Mackenzie、Said A. Said、Amlan K. Pal、Mohammad A. Haghighatbin、Azin Babaei、Michele Sessolo、David B. Cordes、Alexandra M. Z. Slawin、Paul C. J. Kamer、Henk J. Bolink、Conor F. Hogan、Eli Zysman-Colman
DOI:10.1021/acs.inorgchem.1c00804
日期:2021.7.19
correlate the powder photoluminescence quantum yields with the % Vbur of the P^P ligand. The most emissive complexes were used to fabricate both organic light-emitting diodes and light-emitting electrochemical cells (LECs), both of which showed moderate performance. Compared to the benchmark copper(I)-based LECs, [Cu(dnbp)(DPEPhos)]+ (maximum external quantum efficiency, EQEmax = 16%), complex 3 (EQEmax
我们报告了一系列形式为 [Cu(P^P)(dmphen)]BF 4的七种阳离子杂配铜 (I) 配合物,其中 dmphen 是 2,9-二甲基-1,10-菲咯啉,P^P 是二膦螯合物,其中研究了二膦配体的咬合角对配合物光物理性质的影响。几种配合物在固态下表现出中等高的光致发光量子产率,Φ PL高达 35%,在溶液中,Φ PL高达 98%。我们能够将粉末光致发光量子产率与 % V bur 相关联P^P 配体。发射率最高的配合物用于制造有机发光二极管和发光电化学电池 (LEC),两者均表现出中等性能。与基准铜 (I) 基 LEC 相比,[Cu(dnbp)(DPEPhos)] +(最大外部量子效率,EQE max = 16%),复合物3(EQE max = 1.85%)显示出更长的器件寿命( t 1/2 = 1.25 小时和 >16.5 小时 [Cu(dnbp)(DPEPhos)] +和复合物3,
PALLADIUM-CATALYZED DECARBONYLATION OF FATTY ACID ANHYDRIDES FOR THE PRODUCTION OF LINEAR ALPHA OLEFINS
申请人:CALIFORNIA INSTITUTE OF TECHNOLOGY
公开号:US20140155666A1
公开(公告)日:2014-06-05
The present invention is directed to methods of forming olefins, especially linear alpha olefins from fatty acids or anhydrides, each method comprising: contacting an amount of precursor carboxylic acid anhydride with a palladium catalyst comprising a bidentate bis-phosphine ligand in a reaction mixture so as to form an olefin in a product with the concomittant formation and removal of CO and water from the reaction mixture, either directly or indirectly, wherein the reaction mixture is maintained with a sub-stoichiometric excess of a sacrificial carboxylic acid anhydride, an organic acid, or both, said sub-stoichiometric excess being relative to the amount of the precursor carboxylic acid anhydride. The precursor carboxylic acid anhydride may be added to the reaction mixture directly or formed in situ by the reaction between at least one precursor carboxylic acid with a stoichiometric amount of the sacrificial acid anhydride.
Catalytic Activity and Fluxional Behavior of Complexes Based on RuHCl(CO)(PPh<sub>3</sub>)<sub>3</sub> and Xantphos-Type Ligands
作者:Dennis Pingen、Tomas Lebl、Martin Lutz、Gary S. Nichol、Paul C. J. Kamer、Dieter Vogt
DOI:10.1021/om5003182
日期:2014.6.9
With RuHCl(CO)(PPh3)3 as the starting material, the complexes RuHCl(CO)(PPh3)(L) were prepared for L = Xantphos and closely related ligands. Their catalytic activity in the direct amination of cyclohexanol showed large differences depending on the different backbone structures. In those complexes the Xantphos-type ligand backbones are slightly bent and display fluxionality, studied by VT-NMR. This
[EN] METHODS FOR SYNTHESIZING SUBSTITUTED TETRACYCLINE COMPOUNDS<br/>[FR] PROCÉDÉS SERVANT À SYNTHÉTISER DES COMPOSÉS DE TÉTRACYCLINE SUBSTITUÉE
申请人:PARATEK PHARM INNC
公开号:WO2009009042A1
公开(公告)日:2009-01-15
Methods for synthesizing a carboxaldehyde substituted tetracycline compound comprising reacting a tetracycline reactive intermediate under appropriate conditions with carbon monoxide, a palladium catalyst, a phosphine ligand, a silane and a base, such that said carboxaldehyde substituted tetracycline compound is synthesized. The palladium catalyst is chosen from PdCl2 (tBu2PhP)2 dichlorobis (di-tert-butylphenylphosphine palladium (II)] or PdCl2 (DPEPhos) [bis (diphenylphosphinophenyl) ether palladium (II) chloride]. The tetracycline reactive intermediate contains moieties selected from halogens and triflates. Methods of synthesizing a substituted tetracycline compound comprising reacting the carboxaldehyde substituted tetracycline compound under palladium catalyzed coupling conditions, hydrogenolysis conditions or reductive amination conditions.
Origin of the Bite Angle Effect on Rhodium Diphosphine Catalyzed Hydroformylation
作者:Lars A. van der Veen、Peter H. Keeven、Gerard C. Schoemaker、Joost N. H. Reek、Paul C. J. Kamer、Piet W. N. M. van Leeuwen、Martin Lutz、Anthony L. Spek
DOI:10.1021/om990734o
日期:2000.3.6
were obtained. In contrast to the natural biteangle calculations, approximately the same diphosphinebiteangles were observed in both crystal structures. The solution structures of the (diphosphine)Rh(CO)H(PPh3) and (diphosphine)Rh(CO)2H complexes were studied by IR and NMR spectroscopy. The spectroscopic studies showed that all (diphosphine)Rh(CO)2H complexes exhibit dynamic equilibria between diequatorial