54300-35-5Relevant academic research and scientific papers
Visible-Light Driven C-P Bond Formation with Recyclable Carbon Nitride Photocatalyst
Guo, Wusheng,Liu, Yang
, (2022/05/12)
The development of metal-free chemical process with recyclable heterogeneous catalyst under ambient conditions is highly desired in industrial production, especially for pharmaceutical purpose. We herein reported the efficient synthesis of pharmaceuticall
Microwave assisted P–C coupling reactions without directly added P-ligands
Henyecz, Réka,Huszár, Bianka,Keglevich, Gy?rgy,Mucsi, Zoltán
, (2021/12/24)
Our group introduced a green protocol for the Pd(OAc)2- or NiCl2-catalyzed P–C coupling reaction of aryl halides and various > P(O)H-compounds under MW conditions without directly added P-ligands. The reactivity of a few aryl derivatives in the Pd(OAc)2-catalyzed Hirao reaction was also studied. An induction period was observed in the reaction of bromobenzene and diphenylphosphine oxide. Finally, the less known copper(I)-promoted P–C coupling reactions were investigated experimentally. The mechanism was explored by quantum chemical calculations.
Palladium-Catalyzed C-P Cross-Coupling between (Het)aryl Halides and Secondary Phosphine Oxides
Zakirova, Gladis G.,Mladentsev, Dmitrii Yu.,Borisova, Nataliya E.
, p. 2379 - 2386 (2019/05/24)
An efficient procedure for C-P bond formation via the palladium-catalyzed [Pd(OAc) 2 /dppf/Cs 2 CO 3 ] reaction between dichloroheterocycles and secondary phosphine oxides was developed. The steric and electronic properties of substituents were varied to establish the scope and limitations of the method developed. By applying these conditions, a variety of new heterocyclic compounds bearing two tertiary phosphine oxides were successfully synthesized in moderate to excellent yields. After adjustments to the reaction conditions [Pd(OAc) 2 /dippf/ t -BuOK], cross-coupling of secondary phosphine oxides with bulky (secondary or tertiary alkyl) substituents on the phosphorus atom was achieved. Extension of the methodology to monohalohetarenes and monohaloarenes was successfully carried out; once again, the steric and electronic properties of the halides were varied widely. The desired reaction occurred in all cases studied, giving high to excellent yields of product regardless of the nature and positions of substituents.
ORGANIC ELECTROLUMINESCENT ELEMENT AND NOVEL ALCOHOL-SOLUBLE PHOSPHORESCENT MATERIAL
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, (2012/10/23)
Object of the present invention is to provide an organic electroluminescent element having an emissive layer that may be formed by wet process in the fabrication of the organic electroluminescence device with multi-layer structure and has excellent electron-injection property, electron-transfer property, durability and luminescent efficiency and a novel alcohol-soluble organic phosphorescent material that may be preferably applicable to the fabrication of the same. An organic electroluminescent element 1 has a plurality of laminated organic layers 4, 5, 6 sandwiched between anode 3 and cathode 7. A hole transport layer 5 composed of organic compounds insoluble in alcohol solvent and an emissive layer 6 formed by a wet process so that it contacts with the hole transport layer 5 on the side facing with the cathode 7 contains host materials consisting of one or more phosphine oxide derivatives soluble in alcohol solvent and guest materials soluble in alcohol solvent which can be excited electrically to emit light.
Halogenated biphenyl-2,2'-diylbisdiphenylphosphines, their preparation and their use
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, (2008/06/13)
Compounds of the formula I STR1 in which the phenyl rings of the biphenyl molecule can be substituted with up to 8 fluorine and/or chlorine atoms are suitable as catalysts.
Efficient synthesis of (R)- and (S)-(6,6'-difluorobiphenyl-2,2'-diyl) bis(diphenylphosphine); Electron-poor biphenyl-type ligands for transition metal catalysts
Jendralla,Chang Hua Li,Paulus
, p. 1297 - 1320 (2007/10/02)
Racemic title compound (RS)-5 is synthesized (Scheme 1, 100g scale) in four simple steps (49% overall yield) from meta-fluorobromobenzene 1. (RS)-5 is efficiently resolved (Scheme 2) utilizing commercial (S)-(+)-dipalladium complex 9 to give homochiral (S)-(+)-5 and (R)-(-)-5 in 75 and 95% of theoretical yield, respectively. Enantiomerically pure diphosphines (S)-5 and (R)-5 do not racemize in organic solutions, even when heated to 207°C. Homochiral palladium(II) dichloride complexes (-)-11 and (+)-11 are prepared in quantitative yield. In situ rhodium(I)-complex of homochiral 5 is an efficient catalyst for alkene - hydroboration by catecholborane and requires high hydrogen pressure to catalyze hydrogenation. Interesting anomalies of the specific rotation are observed for homochiral diphosphines (S)-(+)-5 and (R)-(-)-5. The specific rotation [α](D)25 of (S)-(+)-5 measured in similar aromatic hydrocarbons (toluene, o-xylene, mesitylene, tetralin) varies from +114.9 (c 0.99, toluene) to -73.9 (c 0.46, tetralin).
