- Ag-Catalyzed Cyclization of Arylboronic Acids with Elemental Selenium for the Synthesis of Selenaheterocycles
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A general method for the synthesis of five-membered and six-membered selenaheterocycles through Ag-catalyzed C?Se bond-forming reaction is reported. This reaction proceeds via intramolecular cyclization of arylboronic acids with selenium powder. Preliminary mechanism studies demonstrate that this transformation involves a selenium-centred radical intermediate. (Figure presented.).
- Gao, Wen-Xia,Huang, Xiao-Bo,Liu, Miao-Chang,Wu, Hua-Yue,Zhang, Xue,Zhou, Yun-Bing
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p. 5639 - 5644
(2020/11/30)
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- Synthesis method of 2-phenoxy phenylboronic acid
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The invention relates to a synthesis method of 2-phenoxy phenylboronic acid. The synthesis method comprises the following steps: using phenol and benzene ring-containing organic acid as initial raw materials and synthesizing diphenyl ether; and then performing hydrogen removal on the diphenyl ether and reacting the diphenyl ether subjected to hydrogen removal with boric acid ester to obtain 2-phenoxy phenylboronic acid. Compared with the prior art, the method has the advantages that the product is synthesized by directly removing hydrogen from aryl, the raw materials are cheap and easily available, the selectivity is good and the atom economy is good; the method is short in synthetic route, high in reaction efficiency and high in total yield; and thus the method is very suitable for industrial popularization.
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Paragraph 0022-0023
(2020/05/14)
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- Intramolecular Aryl Migration of Diaryliodonium Salts: Access to ortho-Iodo Diaryl Ethers
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By using vicinal trifluoromethanesulfonate-substituted diaryliodonium salts, a novel approach was developed for the synthesis of ortho-iodo diaryl ethers by intramolecular aryl migration. The reaction conditions are mild with a broad substrate scope. Mechanistic insight suggests a sulfonyl-directed nucleophilic aromatic substitution pathway. Additionally, the product ortho-iodo diaryl ethers serve as versatile synthons as demonstrated with several coupling reactions. Furthermore, a useful thyroxine analogue of the 3-iodo-l-thyronine (3-T1) derivative was synthesized by this aryl migration procedure.
- Chen, Huangguan,Han, Jianwei,Wang, Limin
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p. 12313 - 12317
(2018/09/10)
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- Investigation of Iodonium Trifluoroborate Zwitterions as Bifunctional Arene Reagents
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The synthesis of a new family of iodonium zwitterions, in which the formal anion is a trifluoroborate moiety, is reported. These reagents present very good stability and have high resistance toward benzyne formation. Their structures were confirmed by X-ray crystallographic analysis and were further investigated using DFT calculations. QTAIM analysis supports an ionic, noncovalent, I+···BF3- interaction, in accordance with a true zwitterionic nature. Preliminary results of synthetic applications, the arylation of phenolates and trifluoroborate group functionalization, are reported.
- Robidas, Rapha?l,Guérin, Vincent,Proven?al, Laurent,Echeverria, Marco,Legault, Claude Y.
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supporting information
p. 6420 - 6423
(2017/12/08)
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- Anthracene compound, preparing method of anthracene compound and organic light-emitting device
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The invention provides an anthracene compound. The anthracene compound has a structure in the formula (I), wherein Q is the C1-60 alkyl group or the C6-60 aryl group or the C5-60 condensed ring group or the C5-60 heterocyclic group; Ar is the C6-60 aryl group or the C5-60 condensed ring group or the C5-60 heterocyclic group; and Ar1 is H, the C1-60 alkyl group, the C1-60 alkoxy group, the C1-60 ether group, the C6-60 aryl group, the C6-60 condensed ring group, the C6-60 heterocyclic group and the C6-60 arylamine group. Compared with the prior art, the anthracene compound is connected with an aromatic compound through anthracene, and the Q, Ar and Ar1 groups are introduced, so that a device emits blue light after the organic compound is applied to the organic light-emitting device; and meanwhile, the means that the above groups are used for adjusting the light-emitting wavelength is adopted, the light-emitting efficiency of the organic light-emitting device is high, and the service life is long.
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Paragraph 0128-0131
(2017/05/02)
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- Compound containing anthracene and pyrene and preparing method and application thereof
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The invention provides a compound containing anthracene and pyrene and a preparing method and application thereof. The compound has a structure shown in formula I, wherein R1 and R3 are independently selected from substituted or unsubstituted C1-C60 alkyl groups, substituted or unsubstituted C6-C60 aryl groups, substituted or unsubstituted C10-C60 condensed ring groups or substituted or unsubstituted C5-C60 heterocyclic groups; R2 is selected from hydrogen, substituted or unsubstituted C6-C60 aryl groups, substituted or unsubstituted C5-C60 heterocyclic groups, substituted or unsubstituted C10-C60 condensed ring groups or substituted or unsubstituted C5-C60 arylamine groups; n is 0 or 1. When current density is 20 mA/cm2, the current efficiency of the compound with the structure shown in formula I is as high as 8.9 cd/A, and service life is as long as 8500 h which is much longer than that of existing electroluminescent materials.
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Paragraph 0147-0152
(2017/02/24)
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- Sequential one-pot access to molecular diversity through aniline aqueous borylation
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On the basis of our recently reported aniline aqueous borylation, molecular diversity was achieved in a one-pot process by combining other reactions such as esterification, Suzuki-Miyaura coupling, hydrogenolysis, or Petasis borono-Mannich.
- Erb, William,Albini, Mathieu,Rouden, Jacques,Blanchet, Jrme
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p. 10568 - 10580
(2015/01/08)
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- INTRACELLULAR CALCIUM CONCENTRATION INCREASE INHIBITORS
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An intracellular calcium concentration increase inhibitor containing as the active ingredient (1) a boron compound represented by the formula (I). The compound represented by the formula (I) inhibits the increase of the intracellular calcium concentration
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Page/Page column 61
(2010/02/07)
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- Catalytic Asymmetric Aldol-Type Reactions Using a Chiral (Acyloxy)borane Complex
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In the presence of 20 molpercent of a chiral (acyloxy)borane (CAB) complex prepared from BH3*THF and a chiral mono-O-acylated tartaric acid, achiral silyl enol ethers or ketene silyl acetals react with achiral aldehydes to afford the corresponding aldol-t
- Ishihara, Kazuaki,Maruyama, Tohru,Mouri, Makoto,Gao, Qingzhi,Furuta,Kyoji,Yamamoto, Hisashi
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p. 3483 - 3491
(2007/10/02)
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