100-29-8Relevant articles and documents
Radical Anion Promoted Chemoselective Cleavage of Csp2-S Bond Enables Formal Cross-Coupling of Aryl Methyl Sulfones with Alcohols
Bai, Jixiang,Wang, Tianxin,Dai, Botao,Liu, Qingchao,Yu, Peiyuan,Jia, Tiezheng
, p. 5761 - 5765 (2021)
A novel formal cross-coupling of aryl methyl sulfones and alcohols affording alkyl aryl ethers via an SRN1 pathway is developed. Two marketed antitubercular drugs were efficiently prepared employing this approach as the key step. A dimsyl-anion initiated radical chain process was revealed as the major pathway. DFT calculations indicate that the formation of a radical anion via nucleophilic addition of alkoxide to the aryl radical is the key step in determining the observed chemoselectivity.
Nucleophilic aromatic cine-substitution of hydrogen: The ionic liquid-promoted von Richter reaction
Epishina, Margarita A.,Kulikov, Alexander S.,Ignat'ev, Nikolai V.,Schulte, Michael,Makhova, Nina N.
, p. 41 - 43 (2015)
Conversion of 4-R-nitrobenzenes into 3-R-benzoic acids under the action of KCN in the EtOH-H2O mixture (the von Richter reaction) is significantly accelerated by ionic liquids thus allowing to extend the scope of the reaction. The finding is pi
Microwave chemistry in silicon carbide reaction vials: Separating thermal from nonthermal effects
Obermayer, David,Gutmann, Bernhard,Oliver Kappe
, p. 8321 - 8324 (2009)
Running oil-bath chemistry in a microwave! Using reaction vials made out of strongly microwave-absorbing silicon carbide (SiC) in a microwave reactor simulates experiments conducted in an autoclave with conductive heating because of the efficient shielding of the electromagnetic field by the SiC vial. This technology makes it possible to study the significance of microwave effects.
Ethoxylation of o, p-nitrochlorobenzene using phase transfer catalysts by microwave irradiation
Yungcheng,Dabin,Yulin
, p. 2117 - 2119 (1992)
Microwave irradiation is very efficient to accelerate the rate of ethoxylation of o, p - nitrochlorobenzene. The enhancement of reaction rate is 144-240 fold
Chromogenic nitrophenolate-based substrates for light-driven hybrid P450 BM3 enzyme assay
Lam, Quan,Cortez, Alejandro,Nguyen, Thanh Truc,Kato, Mallory,Cheruzel, Lionel
, p. 86 - 91 (2016)
The incorporation of a p-nitrophenoxy moiety in substrates has enabled the development of colorimetric assays to rapidly screen for O-demethylation activity of P450 enzymes. For the light-driven hybrid P450 BM3 enzymes, where a Ru(II) photosensitizer powers the enzyme upon visible light irradiation, we have investigated a family of p-nitrophenoxy derivatives as useful chromogenic substrates compatible with the light-driven approach. The validation of this assay and its adaptability to a 96-well plate format will enable the screening of the next generation of hybrid P450 BM3 enzymes towards C-H bond functionalization of non-natural substrates.
Photoinduced Iron-Catalyzed ipso-Nitration of Aryl Halides via Single-Electron Transfer
Wu, Cunluo,Bian, Qilong,Ding, Tao,Tang, Mingming,Zhang, Wenkai,Xu, Yuanqing,Liu, Baoying,Xu, Hao,Li, Hai-Bei,Fu, Hua
, p. 9561 - 9568 (2021/08/06)
A photoinduced iron-catalyzed ipso-nitration of aryl halides with KNO2 has been developed, in which aryl iodides, bromides, and some of aryl chlorides are feasible. The mechanism investigations show that the in situ formed iron complex by FeSO4, KNO2, and 1,10-phenanthroline acts as the light-harvesting photocatalyst with a longer lifetime of the excited state, and the reaction undergoes a photoinduced single-electron transfer (SET) process. This work represents an example for the photoinduced iron-catalyzed Ullmann-type couplings.
Preparation method of p-nitrophenetole and special loop reactor
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Paragraph 0033-0068, (2021/06/22)
The invention discloses a preparation method of p-nitrophenetole, which takes p-nitrochlorobenzene, sodium hydroxide and ethanol as raw materials to perform etherification reaction to prepare the p-nitrophenetole. Wherein p-nitrophenetole is prepared by a
Production method of o/p-nitrophenetole
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Paragraph 0036-0050, (2021/06/09)
The invention discloses a production method of o/p-nitrophenetole, which comprises the following steps: (1) adding o/p-nitrochlorobenzene and ethanol into a four-neck flask provided with a heating reflux matching device, then adding N-methylmorpholine, co
Mustard Carbonate Analogues as Sustainable Reagents for the Aminoalkylation of Phenols
Annatelli, Mattia,Trapasso, Giacomo,Salaris, Claudio,Salata, Cristiano,Castellano, Sabrina,Aricò, Fabio
supporting information, p. 3459 - 3464 (2021/05/24)
N,N-dialkyl ethylamine moiety can be found in numerous scaffolds of macromolecules, catalysts, and especially pharmaceuticals. Common synthetic procedures for its incorporation in a substrate relies on the use of a nitrogen mustard gas or on multistep syntheses featuring chlorine hazardous/toxic chemistry. Reported herein is a one-pot synthetic approach for the easy introduction of aminoalkyl chain into different phenolic substrates through dialkyl carbonate (β-aminocarbonate) chemistry. This new direct alcohol substitution avoids the use of chlorine chemistry, and it is efficient on numerous pharmacophore scaffolds with good to quantitative yield. The cytotoxicity via MTT of the β-aminocarbonate, key intermediate of this synthetic approach, was also evaluated and compared with its alcohol precursor.
Valorisation of urban waste to access low-cost heterogeneous palladium catalysts for cross-coupling reactions in biomass-derived γ-valerolactone
Valentini, Federica,Ferlin, Francesco,Lilli, Simone,Marrocchi, Assunta,Ping, Liu,Gu, Yanlong,Vaccaro, Luigi
, p. 5887 - 5895 (2021/08/23)
Herein we report a simple protocol for the valorisation of a common urban biowaste. The lignocellulosic biomass obtained after the pre-treatment of pine needle urban waste is efficiently transformed into a low-cost support (PiNe) for the immobilization of Pd nanoparticles. The final Pd/PiNe heterogeneous catalyst features a small particle size (4.5 nm) and a metal loading (9.9 wt%) comparable with most commercially available and generally used counterparts. In this contribution, we tested the catalytic efficiency of the Pd/PiNe system in two representative cross-couplings, Heck and Hiyama reactions, and compared the results obtained with commercial Pd/C catalyst. The good reactivity in the biomass-derived solvent (GVL) confirms that the Pd/PiNe heterogeneous catalyst is a valid system that can be integrated into a waste valorization chain within a circular economy approach. In addition, the efficiency of the catalyst has also been extended to perform the challenging consecutive Hiyama-Heck reaction to afford differently substituted (E)-1,2-diarylethenes.