4746-81-0Relevant articles and documents
Functional material based on stable chemical structure
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Paragraph 0291; 0333, (2021/08/25)
The invention relates to functional materials based on stable chemical structures. A series of novel donor - acceptor type TADF activated emitters have been designed, which are intended to develop stable OLED. with enhanced operational stability and improved color purity that can be used in full color displays and lighting applications.
Formation of acylsilenolates from Bis(acyl)trisilanes as the silicon analogues of acylenolates
Ohshita, Joji,Kawamoto, Hiroyuki,Kunai, Atsutaka,Ottosson, Henrik
body text, p. 4199 - 4202 (2011/01/03)
Reactions of bis(acyl)trisilanes with tris(trimethylsilyl)silyllithium in THF, followed by treatment of the resulting dark red solutions with alkyl halides, gave the Si-alkylated products and tetrakis(trimethylsilyl)silane, indicating the formation of lithium acylsilenolates via Si-Li exchange. Exothermic formation of lithium acylsilenolate was demonstrated by DFT calculations on a model reaction.
Synthesis of highly hindered 1,2-diaryl diketones and of cis- and trans-1,2-diacetoxy-1,2-bis(aryl)ethenes
Nudelman, Norma,Schulz, Hernan
, p. 422 - 423 (2007/10/03)
Highly hindered 1,2-diaryl diketones can be synthesized in good yields by the reaction of 1-aryllithium with CO in THF solution at atmospheric pressure; preparation of cis- and trans-1,2-diacetoxy-1,2-bis(Mes)ethene can be also afforded by a similar procedure and further quenching with Ac2O.
(2,4,6-Trimethylbenzoyl)diphenylphosphine oxide photochemistry. A direct time-resolved spectroscopic study of both radical fragments
Sluggett, Gregory W.,Turro, Claudia,George, Michael W.,Koptyug, Igor V.,Turro, Nicholas J.
, p. 5148 - 5153 (2007/10/02)
The photochemistry of (2,4,6-trimethylbenzoyl)diphenylphosphine oxide (1) has been investigated using time-resolved infrared (TRIR) and time-resolved UV spectroscopy (laser flash photolysis (LFP)), in addition to conventional photochemical steady-state te
Electron Transfer in the Reactions of Aryllithium Compounds with Carbon Monoxide
Nudelman, N. Sbarbati,Doctorovich, Fabio
, p. 4651 - 4666 (2007/10/02)
The reactions of aryllithium compounds (Ar = phenyl, 1-naphthyl, xylyl, mesityl) with CO have been studied under several reaction conditions.A 13C NMR method developed to determine radicals at preparative concentrations revealed the presence of radical anions in the reaction mixtures in concentrations comparable to those of the reagents.ESR spectroscopic studies, the effect of radical inhibitors, kinetic measurements and isolation of derivatives of some intermediates suggest a mechanism that involves electron transfer as the first and rate determining step of the reaction.
Studies on the Occurence of Hydrogen Transfer, 67. Enediol Diesters by Acylating Electroreductive Dimerization of Acyl Chlorides with Lithium Amalgam
Horner, Leopold,Dickerhof, Karlheinz
, p. 1603 - 1614 (2007/10/02)
Aromatic, aliphatic, and aromatic-aliphatic acyl chlorides (and anhydrides) are transformed by lithium amalgam (Li/Hg) to cis- and/or trans enediol diesters 1-10 (acylating reductive dimerization), mostly in ca. 70percent yields.The influence of the solvent on the reaction course is investigated.Starting from 2,2'-biphenyldicarbonyl dichloride, the phenanthrene 7 is formed; phthalide 8 is the reaction-product using phthaloyl dichloride as starting material.Diphenylphosphinyl chloride is reduced by Li/Hg to tetraphenyldiphosphane dioxide (15).A reaction mechanism for the acylating reductive dimerization is proposed on the basis of the halve-wave potentials determined for 12 acyl chlorides and four 1,2-diketones.The latter are intermediates in the acylating reductive dimerization of the acyl chlorides.Enediol diesters are obtained starting from 1,2-diketones and Li/Hg in the presence of acyl chlorides.Trimethylsilyl chloride is unsuitable as a trap for the enediols; it is preferentially reduced at the Li/Hg interface.Tetrahydrofuran as solvent is transformed to RC(O)O-4-Cl by a known ring-opening acylation reaction in the presence of Lewis acids (LiCl or ZnCl2) formed by the decomposition of Li/Hg and Zn/Hg.
Evidence for Electron-transfer Process in Abnormal Gringard Reactions. Enolization and α-Diketone Formation
Okubo, Masao,Morigami, Yoshiaki,Suenaga, Reiko
, p. 3029 - 3030 (2007/10/02)
The effect of 2,6-dimethyl groups on enolization vs. addition in the reaction of PhMgBr with PhCH2COPh, and also the formation of α-diketone from 2,4,6-Me3C6H2COCl by the treatment with MeMgX and i-PrMgX in the presence of CoCl2, were studied.The results were discussed on the basis of electron-transfer mechanism.
