42495-50-1Relevant academic research and scientific papers
Recyclable polyetheretherketone fiber-supported N-heterocyclic carbene catalysts for nucleophilic acylation of fluorobenzenes
Shi, Xian-Lei,Sun, Benyu,Hu, Qianqian,Liu, Kun,Li, Pengyu,Wang, Juanjuan
supporting information, p. 11390 - 11393 (2020/10/12)
We report for the first time a novel support of polyetheretherketone fiber for the synthesis of recyclable N-heterocyclic carbene (NHC) catalysts. The fiber catalysts were verified in nucleophilic acylation of fluorobenzenes with superior catalytic activities, and successfully recycled by a tiny pair of tweezers over 21 cycles with minimal loss of performance.
Transition-Metal-Free Regiospecific Aroylation of Nitroarenes Using Ethyl Arylacetates at Room Temperature
Kumar, Promod,Sharma, Anup Kumar,Guntreddi, Tirumaleswararao,Singh, Rahul,Singh, Krishna Nand
supporting information, p. 744 - 747 (2018/02/09)
A novel regiospecific C(sp3)-C(sp2) coupling between ethyl arylacetates and nitroarenes has been developed to deliver biaryl ketones in excellent yields. The protocol is metal-free, mild, and compatible with a number of functional groups on both of the reacting partners.
Aerobic oxidative acylation of nitroarenes with arylacetic esters under mild conditions: Facile access to diarylketones
Li, Jiang-Sheng,Yang, Qian,Yang, Fan,Chen, Guo-Qin,Li, Zhi-Wei,Kuang, Yin-Jie,Zhang, Wei-Jing,Huang, Peng-Mian
, p. 140 - 145 (2017/12/27)
A facile and regioselective base-mediated aerobic oxidative acylation of nitroarenes to access diarylketones under mild conditions has been developed. It features the use of bench-stable and readily available arylacetates as acyl surrogates, and the absence of transition-metals and synthetic oxidants. This protocol involves a cascade CDC/oxidative decarboxylation process.
Diarylketone preparation method
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Paragraph 0019; 0020, (2017/09/05)
The invention discloses a diarylketone preparation method. According to the method, substituted nitrobenzene and aromatic acetic ester are dissolved in an organic solvent, alkali is added, the mixture is subjected to a reaction in the air or oxygen atmosphere at the temperature of 10-60 DEG C for 0.5-24 h, and diarylketone is obtained; the mole ratio of substituted nitrobenzene to aromatic acetic ester is (0.5:1)-(5:1), and the mole ratio of alkali to aromatic acetic ester is (1:1)-(5:1). The method overcomes defects caused by the adoption of strong acid or expensive metal reagents or strong oxidizers and the like in the prior art and has the advantages as follows: 1) with air as an oxidizer, use of strong or expensive chemical oxidizers is avoided; 2) no transition metal catalysts are used, so that the condition that heavy metal ions are left in a product is avoided; 3) without inductive groups, surplus steps of introduction of the inductive groups and removal of the inductive groups are avoided; 4) acylation of ortho positions or para positions of nitro-aromatic compounds is directly realized, which cannot be realized with a classic Friedel-Crafts acylation method. The synthesis method plays an important role in preparing diarylketone, particularly industrial production of acylation products of ortho positions or para positions of the nitro-aromatic compounds.
In situ generation of palladium nanoparticles: Ligand-free palladium catalyzed pivalic acid assisted carbonylative Suzuki reactions at ambient conditions
Zhou, Qing,Wei, Shaohua,Han, Wei
, p. 1454 - 1460 (2014/03/21)
Highly selective carbonylative Suzuki reactions of aryl iodides with arylboronic acids using an in situ generated nanopalladium system furnished products in high yields. The reactions were performed under ambient conditions and in the absence of an added ligand. The key to success is the addition of pivalic acid, which can effectively suppress undesired Suzuki coupling. The synthesis can be easily scaled up, and the catalytic system can be reused up to nine times. The nature of the active catalytic species are discussed.
MoO2Cl2 as a novel catalyst for Friedel-Crafts acylation and sulfonylation
de Noronha, Rita G.,Fernandes, Ana C.,Rom?o, Carlos C.
experimental part, p. 1407 - 1410 (2009/06/18)
The use of MoO2Cl2 as a novel catalyst for Friedel-Crafts acylation and sulfonylation is described. A series of aromatic ketones and sulfones were prepared in moderate to good yields using acyl chloride or sulfonyl chloride in the presence of MoO2Cl2 (20 mol %), under solvent-free conditions.
Friedel-Crafts acylation of aromatic compounds with carboxylic acids in the presence of P2O5/SiO2 under heterogeneous conditions
Zarei, Amin,Hajipour, Abdol R.,Khazdooz, Leila
scheme or table, p. 6715 - 6719 (2009/04/07)
A convenient and efficient procedure for the Friedel-Crafts acylation of aromatic compounds with carboxylic acids in the presence of P2O5/SiO2 is described. Both aromatic and aliphatic carboxylic acids reacted easily to afford the corresponding aromatic ketones. The use of non-toxic and inexpensive materials, simple and clean work-up, short reaction times and good yields of the products are the advantages of this method.
Reactions of 2-hydroxybenzophenones with Corey-Chaykovsky reagent
Chittimalla, Santhosh Kumar,Chang, Tsung-Che,Liu, Ting-Chun,Hsieh, Hsing-Pang,Liao, Chun-Chen
, p. 2586 - 2595 (2008/09/19)
A variety of 2-hydroxybenzophenones on reaction with Corey-Chaykovsky reagent underwent unprecedented rearrangements leading to 3-substituted benzofurans 8 and one-carbon homologated compounds 9 and 12. Compounds 9 could further be quantitatively transfor
Application of the catalytic friedel-crafts acylation reaction and regioselectivity correlations
Wilkinson, Mark C.,Saez, Fabienne,Wei, Lee Hon
, p. 1063 - 1066 (2007/10/03)
A correlation was found between electronic properties and regioselectivity in the Friedel-Crafts reaction of substituted phenylacetic and benzoic acids with anisole, utilising substoichiometric (down to 1 mol%) amounts of catalyst. Relative reactivities of selected catalysts for this reaction were also studied. Georg Thieme Verlag Stuttgart.
A novel thiourea ligand applied in the Pd-catalyzed Heck, Suzuki and Suzuki carbonylative reactions
Mingji, Dai,Liang, Bo,Wang, Cuihua,You, Zejin,Xiang, Jing,Dong, Guangbin,Chen, Jiahua,Yang, Zhen
, p. 1669 - 1673 (2007/10/03)
A novel C2 symmetrical and sterically bulky thiourea ligand 1 has been successfully applied to Heck, Suzuki and Suzuki-type carbonylative coupling reactions under aerobic conditions. Since the metal-sulfur bond in the thiourea complexes is stronger than the metal-phosphorus bond of typical phosphine complexes, thiourea ligands generally do not easily dissociate from the metal center under catalytic conditions, which establishes the thiourea 1-based palladium complexes as effective catalysts for the palladium-catalyzed cross-coupling reactions.
