4559-70-0Relevant articles and documents
An expedient access to γ-ketophosphine chalcogenides via the chemo-and regioselective addition of secondary phosphine chalcogenides to β,γ-ethylenic ketones
Artem’Ev, Alexander V.,Malysheva, Svetlana F.,Belogorlova, Nataliya A.,Protzuk, Nadezhda I.,Albanov, Alexander I.,Bagryanskaya, Irina Y.,Schmidt, Elena Y.,Gusarova, Nina K.,Trofimov, Boris A.
, p. 455 - 462 (2015)
γ-Ketophosphine chalcogenides, precursors for plethora of novel functionalized phosphine chalcogenides and phosphines, are synthesized by chemo-and regioselective addition of secondary phosphine chalcogenides to β,γ-ethylenic ketones under catalyst-and so
Metal-Free, Visible Light-Photocatalyzed Synthesis of Benzo[b]phosphole Oxides: Synthetic and Mechanistic Investigations
Quint, Valentin,Morlet-Savary, Fabrice,Lohier, Jean-Fran?ois,Lalevée, Jacques,Gaumont, Annie-Claude,Lakhdar, Sami
, p. 7436 - 7441 (2016)
Highly functionalized benzo[b]phosphole oxides were synthesized from reactions of arylphosphine oxides with alkynes under photocatalytic conditions by using eosin Y as the catalyst and N-ethoxy-2-methylpyridinium tetrafluoroborate as the oxidant. The reac
Extraction and coordination behavior of diphenyl hydrogen phosphine oxide towards actinides
Das, Dhrubajyoti,Gopakumar, Gopinadhanpillai,Brahmmananda Rao,Sivaraman,Sivaramakrishna, Akella,Vijayakrishna, Kari
, p. 3338 - 3352 (2017)
Extraction behavior of some selected actinides like U(VI), Th(IV), and Am(III) was investigated with three different H-phosphine oxides, viz. diphenyl hydrogen phosphine oxide (DPhPO), dihexyl hydrogen phosphine oxide (DHePO) and diphenyl phosphite (DPP).
Photochemistry and Photophysics of (1-Naphthoyl)diphenylphosphine Oxide
Zhao, Ningning,Strehmel, Bernd,Gorman, Anthony A.,Hamblett, Ian,Neckers, Douglas C.
, p. 7757 - 7765 (1999)
(l-Naphthoyl)diphenylphosphine oxide (1) was synthesized and characterized and its photochemistry investigated using emission spectroscopy, pulse radiolysis, and nanosecond laser flash photolysis. Fluorescence quantum yields are low in aprotic polar and nonpolar solvents. In methanol, as a result of hydrogen-bonding, change of S1 from an n,π* state to a π,π* state leads to the decrease in the rate constant for intersystem crossing and results, finally, in an increase in fluorescence. Preferential solvation was evaluated using the ET indicator "Reichardt's dye" (RD). ETN values were determined by gradually increasing the concentrations of methanol in methanol/acetonitrile mixtures. Fluorescence quantum yields correlate with the ETN values. Photolysis of 1 yields diphenyl[l-naphthoyl)oxy]phosphine (6), formed mainly via cage recombination of radicals. No radicals were detected by either nanosecond laser flash photolysis or pulse radiolysis of 1 in aprotic solvents. However, photolysis in methanol yields radicals when 1 is excited at 266 nm. The phosphinoyl radical can be quenched by either methyl methacrylate (MMA) or oxygen (kq = 5.0 × 107 and 5.3 × 108 M-1 s-1, respectively). Such radical generation most likely results from the singlet excited state.
Phosphinoyl radicals: Structure and reactivity. A laser flash photolysis and time-resolved ESR investigation
Jockusch, Steffen,Turro, Nicholas J.
, p. 11773 - 11777 (1998)
The photochemistry of a series of bis(acyl)phosphine oxides and the rate constants of the reactions of their phosphorus radicals with n-butylacrylate, thiophenol, bromotrichloromethane, oxygen, and methyl viologen have been investigated by laser flash pho
Rh-Catalyzed Regio- and Enantioselective Allylic Phosphinylation
Li, Bing,Li, Changkun,Liu, Min,Rehman, Sajid Ur
supporting information, p. 2893 - 2898 (2022/03/02)
Transition-metal-catalyzed branched and enantioselective allylic substitution of monosubstituted precursors with carbon, nitrogen, oxygen, sulfur, and fluoride nucleophiles has been well-established. However, such a selective carbon-phosphorus bond formation has not been realized probably due to the catalyst deactivation by the strong coordinating nature of phosphinylating reagents. Herein, we report a Rh-catalyzed highly regio- and enantioselective synthesis of allylic phosphine oxides in the presence of a chiral bisoxazoline-phosphine ligand. The application of α-hydroxylalkylphosphine oxides to keep the low concentration of the secondary phosphine oxides is essential for the high yields. The addition of diphenyl phosphoric acid was found to not only activate allylic alcohols but also accelerate the carbon-phosphorus bond formation.
Electrochemical Oxidative C–H Phosphonylation of thiazole derivatives in ambient conditions
Li, Yang,Wu, Lei,Yang, Yan-Tong,Zhu, Jie,Zhu, Peng-Wei
, (2021/12/07)
We herein report a direct electrochemical dehydrogenative C–H phosphonylation of thiazoles derivatives with H2 evolution. Employing electricity as the green and sole oxidant, cheap metal as electrode, the anodic oxidation together with cathodic hydrogen evolution process provides a green and efficient strategy for C–H phosphonylation. A diverse range of phosphorus products were constructed under external metal and oxidant-free conditions at ambient temperature, featuring atom economy, simple operation and wide reaction scope.
Monoacylphosphine oxides with substituents in the phosphonyl moiety as Norrish I photoinitiators: Synthesis, photoinitiattion properties and mechanism
Duan, Haodong,Gao, Jun,Han, Yuxi,Leng, Kangwei,Li, Qianmin,Liu, Dayong,Wang, Zhongwei,Xu, Xiaolei,Yu, Qing
, (2021/09/07)
In order to study the effect of the substituents in the phosphonyl moiety of monoacylphosphine oxide (MAPO) on its stability and initiation performance, (2,4,6-trimethylphenyl)(phenyl)(benzoyl)phosphine oxide (TMBPO), (4-tolyl)(phenyl)(2,4,6-trimethylbenzoyl)phosphine oxide (4-MTPO) and (2,4-xylyl)(phenyl)(2,4,6-trimethylbenzoyl)phosphine oxide (2,4-DMTPO) were designed and prepared. Studies on TMBPO showed that the introduction of methyl groups into the phosphonyl moiety of MAPO significantly enhanced its stability and light absorption abilities. The photopolymerization of trimethylolpropane triacrylate (TMPTA) showed that the initiation efficiency of 4-MTPO and 2,4-DMTPO were higher than that of TPO, regardless of whether it was initiated upon LED at 385 nm or 420 nm. In addition, the migration rates of 4-MTPO and 2,4-DMTPO in cured TMPTA were approximately 1/2 and 1/4 that of TPO, respectively.