1942-83-2Relevant academic research and scientific papers
Palladium-Catalyzed C-P Bond-Forming Reactions of Aryl Nonaflates Accelerated by Iodide
McErlain, Holly,Riley, Leanne M.,Sutherland, Andrew
, p. 17036 - 17049 (2021/11/18)
An iodide-accelerated, palladium-catalyzed C-P bond-forming reaction of aryl nonaflates is described. The protocol was optimized for the synthesis of aryl phosphine oxides and was found to be tolerant of a wide range of aryl nonaflates. The general nature of this transformation was established with coupling to other P(O)H compounds for the synthesis of aryl phosphonates and an aryl phosphinate. The straightforward synthesis of stable, isolable aryl nonaflates, in combination with the rapid C-P bond-forming reaction allows facile preparation of aryl phosphorus target compounds from readily available phenol starting materials. The synthetic utility of this general strategy was demonstrated with the efficient preparation of an organic light-emitting diode (OLED) material and a phosphonophenylalanine mimic.
Cu/Picolinamides-Catalyzed Coupling of (Hetero)aryl Halides with Secondary Phosphine Oxides and Phosphite?
Fang, Chao,Wei, Bangguo,Ma, Dawei
supporting information, p. 2957 - 2961 (2021/08/23)
Some 4-hydroxy-picolinic acid derived amides were revealed as more efficient ligands for Cu-catalyzed coupling of (hetero)aryl halides with secondary phosphine oxides and phosphites. Only 3—5 mol% CuI and ligands were required to ensure coupling with a number of (hetero)aryl bromides and iodides to complete at 120 oC in 10—20 h.
Phosphinylation of Non-activated Aryl Fluorides through Nucleophilic Aromatic Substitution at the Boundary of Concerted and Stepwise Mechanisms
You, Zhensheng,Higashida, Kosuke,Iwai, Tomohiro,Sawamura, Masaya
supporting information, p. 5778 - 5782 (2021/01/29)
Non-activated aryl fluorides reacted with potassium diorganophosphinites through a nucleophilic aromatic substitution (SNAr) reaction. Remarkably, both electron-neutral and electron-rich aryl fluorides participated in the reaction with substantially stabilized anionic P nucleophiles to form the corresponding tertiary phosphine oxides. Quantum chemical calculations suggested a nucleophile-dependent mechanism that involves both concerted and stepwise SNAr reaction pathways.
Nickel- and Palladium-Catalyzed Cross-Coupling of Aryl Fluorosulfonates and Phosphites: Synthesis of Aryl Phosphonates
Zhang, Guofu,Wang, Jing,Guan, Chenfei,Zhao, Yiyong,Ding, Chengrong
supporting information, p. 810 - 813 (2021/02/01)
The synthesis of aryl phosphonates via nickel and palladium-catalyzed cross-coupling of aryl fluorosulfonates and phosphites is described. The products were obtained in good to excellent yields under mild conditions with broad functional group compatibility, employing either Pd(OAc)2 and DPEPhos or the readily available NiCl2(dme) and Xantphos as catalytic systems. Noteworthily, the present C(sp2)?P bond formation method could be applied to the direct conversion of phenols to the corresponding aryl phosphonates in one pot via reaction of phenols with SO2F2 and subsequent palladium-catalyzed cross-coupling.
NiCl 2as a Cheap and Efficient Precatalyst for the Coupling of Aryl Fluorosulfonate and Phosphite/Phosphine Oxide
Yan, Wenjie,Zhou, Hongbo,Li, Haoyuan,Hu, Huimin,Yu, Ying,Guo, Shengmei,Cai, Hu
, p. 1453 - 1456 (2021/07/20)
Herein, NiCl 2is employed as a cheap precatalyst in the formation of C(sp 2)-P bond via cross-coupling reaction of phenol derivatives and phosphine oxides/phosphites. This catalytic system allows a variety of phenols with diverse functional groups to transform into phosphates with good yields. No additional additive is used in this reaction.
Palladium-catalyzed one-pot phosphorylation of phenols mediated by sulfuryl fluoride
Zhang, Yiyuan,Chen, Wanting,Tan, Tingting,Gu, Yuang,Zhang, Shuning,Li, Jie,Wang, Yan,Hou, Wei,Yang, Guang,Ma, Peixiang,Xu, Hongtao
supporting information, p. 4588 - 4591 (2021/05/17)
We report a general palladium-catalyzed one-pot procedure for the synthesis of phosphonates, phosphinates and phosphine oxides from phenols mediated by sulfuryl fluoride. It features mild conditions, broad substrate scope, high functionality tolerance and water insensitivity. The utility of this procedure has been well demonstrated by gram-scale synthesis, sequential synthesis of click chemistry building blocks, late-stage decoration of drugs and natural products and on-DNA synthesis of phosphine oxide for a DNA-encoded library (DEL).
Visible-Light-Induced Nickel-Catalyzed P(O)-C(sp2) Coupling Using Thioxanthen-9-one as a Photoredox Catalysis
Zhu, Da-Liang,Jiang, Shan,Wu, Qi,Wang, Hao,Chai, Lu-Lu,Li, Hai-Yan,Li, Hong-Xi
supporting information, p. 160 - 165 (2021/01/09)
An efficient method has been developed for photocatalytic P(O)-C(sp2) coupling of (hetero)aryl halides with H-phosphine oxides or H-phosphites under the irradiation of visible light or sunlight. The thioxanthen-9-one/nickel dual catalysis mediates this ph
Controllable phosphorylation of thioesters: Selective synthesis of aryl and benzyl phosphoryl compounds
Xu, Kaiqiang,Liu, Long,Li, Zhaohui,Huang, Tianzeng,Xiang, Kang,Chen, Tieqiao
, p. 14653 - 14663 (2020/12/29)
The controllable phosphorylations of thioesters were developed. When the reaction was catalyzed by a palladium catalyst, aryl or alkenyl phosphoryl compounds were generated through decarbonylative coupling, while the benzyl phosphoryl compounds were produced through deoxygenative coupling when the reaction was carried out in the presence of only a base.
Palladium-Catalyzed Direct Decarbonylative Phosphorylation of Benzoic Acids with P(O)–H Compounds
Zhang, Ji-Shu,Chen, Tieqiao,Han, Li-Biao
supporting information, p. 1148 - 1153 (2020/02/27)
A direct decarbonylative phosphorylation of benzoic acids catalyzed by palladium was disclosed. Under the reaction conditions, a wide range of benzoic acids coupled readily with all the three kinds of P(O)–H compounds, i.e. secondary phosphine oxides, H-phosphinates and H-phosphonates, producing the corresponding organophosphorus compounds in good to high yields. This reaction could be conducted at a gram scale and applied in the late-stage phosphorylative modification of carboxylic acids drug molecules. These results well demonstrated the potential synthetic value of this new reaction in organic synthesis.
EUROPIUM COMPLEX
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Paragraph 0353-0355, (2020/11/23)
To provide europium complexes having high photostability. A europium complex expressed with the following formula (A): {wherein, RA and RB are independently a cyclic alkyl group with 3 to 10 carbons, respectively, and RC is a cyclic alkyl group with 3 to 10 carbons or a phenyl group expressed with the following formula (B): (wherein, XA, XB, AC, XD and XE independently represent a hydrogen atom; a fluorine atom; an alkyl group with 1 to 3 carbon(s); an alkyloxy group with 1 to 3 carbon(s); an aryloxy group with 6 to 10 carbons; a fluoroalkyl group with 1 to 3 carbon(s); a fluoroalkyloxy group with 1 to 3 carbon(s); or a phenyl group that may be substituted with a fluorine atom, an alkyl group with 1 to 3 carbon(s), an alkyloxy group with 1 to 3 carbon(s), a fluoroalkyl group with 1 to 3 carbon(s), a fluoroalkyloxy group with 1 to 3 carbon(s), a fluorophenyl group, a hydroxyl group or a cyano group, respectively); RA is a cyclic alkyl group with 3 to 10 carbons; RB and RC are a phenyl group expressed with the formula (B), provided, however, that a case where RA a cyclohexyl group, and, RB and RC are a phenyl group is excluded; or RA, RB and RC independently represent an ortho-substituted phenyl group expressed with the following formula (Ba): (wherein, XE represents a hydrogen atom, an alkyl group with 1 to 3 carbon(s), an alkyloxy group with 1 to 3 carbon(s), a fluoroalkyl group with 1 to 3 carbon(s), a fluoroalkyloxy group with 1 to 3 carbon(s), a naphthyl group that may be substituted with a fluorine atom, a pyridyl group that may be substituted with a fluorine atom, or a phenyl group that is expressed with a formula (C): [wherein, ZA, ZC and ZE independently represent a hydrogen atom, a fluorine atom, an alkyl group with 1 to 3 carbon(s), an alkyloxy group with 1 to 3 carbon(s), a fluoroalkyl group with 1 to 3 carbon(s), a fluoroalkyloxy group with 1 to 3 carbon(s), a phenyl group that may be substituted with a fluorine atom, a hydroxyl group or a cyano group; ZB and ZD independently represent a hydrogen atom or a fluorine atom, respectively], provided, however, that a case where RA, RB and RC are all a phenyl group is excluded), respectively; RD represents a hydrogen atom, a deuterium atom or a fluorine atom; WA and WB independently represent an alkyl group with 1 to 6 carbon(s), a fluoroalkyl group with 1 to 6 carbon(s), a phenyl group, a 2-thienyl group or a 3-thienyl group; and ‘n’ represents an integer of 1 to 3}.
