24966-30-1Relevant articles and documents
Stereoselective C?C Oxidative Coupling Reactions Photocatalyzed by Zwitterionic Ligand Capped CsPbBr3 Perovskite Quantum Dots
Cai, Tong,Candler, Yolanda,Chen, Ou,He, Jie,Hills-Kimball, Katie,Shi, Wenwu,Wang, Ping,Wei, Zichao,Yang, Hanjun,Yuan, Yucheng,Zhu, Hua
supporting information, p. 22563 - 22569 (2020/10/12)
Semiconductor quantum dots (QDs) have attracted tremendous attention in the field of photocatalysis, owing to their superior optoelectronic properties for photocatalytic reactions, including high absorption coefficients and long photogenerated carrier lifetimes. Herein, by choosing 2-(3,4-dimethoxyphenyl)-3-oxobutanenitrile as a model substrate, we demonstrate that the stereoselective (>99 %) C?C oxidative coupling reaction can be realized with a high product yield (99 %) using zwitterionic ligand capped CsPbBr3 perovskite QDs under visible light illumination. The reaction can be generalized to different starting materials with various substituents on the phenyl ring and varied functional moieties, producing stereoselective dl-isomers. A radical mediated reaction pathway has been proposed. Our study provides a new way of stereoselective C?C oxidative coupling via a photocatalytic means using specially designed perovskite QDs.
N -Acetyl-3-aminopyrazoles block the non-canonical NF-kB cascade by selectively inhibiting NIK
Pippione, Agnese C.,Sainas, Stefano,Federico, Antonella,Lupino, Elisa,Piccinini, Marco,Kubbutat, Michael,Contreras, Jean-Marie,Morice, Christophe,Barge, Alessandro,Ducime, Alex,Boschi, Donatella,Al-Karadaghi, Salam,Lolli, Marco L.
supporting information, p. 963 - 968 (2018/06/27)
NF-κB-inducing kinase (NIK), an oncogenic drug target that is associated with various cancers, is a central signalling component of the non-canonical pathway. A blind screening process, which established that amino pyrazole related scaffolds have an effect on IKKbeta, led to a hit-to-lead optimization process that identified the aminopyrazole 3a as a low μM selective NIK inhibitor. Compound 3a effectively inhibited the NIK-dependent activation of the NF-κB pathway in tumour cells, confirming its selective inhibitory profile.
PYRAZOLO[1,5-A]PYRIMIDINES AS ANTIVIRAL COMPOUNDS
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Paragraph 0307; 0308; 0309, (2016/11/17)
A compound of formula (I) or a pharmaceutically acceptable salt thereof, useful in therapy, in particular in the treatment of a viral infection.
Enantioselective synthesis of amaryllidaceae alkaloids (+)-vittatine, (+)-epi-vittatine, and (+)-buphanisine
Wei, Meng-Xue,Wang, Cheng-Tao,Du, Ji-Yuan,Qu, Hu,Yin, Pei-Rong,Bao, Xu,Ma, Xiao-Yan,Zhao, Xian-He,Zhang, Guo-Biao,Fan, Chun-An
, p. 1966 - 1971 (2013/09/23)
Cat. on a hot tin roof: Enantioselective catalytic Michael addition of α-cyanoketones to acrylates under bifunctional organocatalysis was used to construct the unique arylic all-carbon quaternary stereocenter, which is synthetically crucial in the chemical synthesis of optically pure cis-aryl hydroindole alkaloids. The protocol offers an asymmetric route to (+)-vittatine, (+)-epi-vittatine, and (+)-buphanisine. Copyright
Oxidative aromatic C-O bond formation: synthesis of 3-functionalized benzo[b]furans by FeCl3-mediated ring closure of a-Aryl ketones
Liang, Zhidan,Hou, Weizhe,Du, Yunfei,Zhang, Yongliang,Pan, Yan,Mao, Deng,Zhao, Kang
supporting information; experimental part, p. 4978 - 4981 (2010/01/16)
A variety of 3-functionalized benzo[b]furans were achieved by way of a FeCl3-medlated Intramolecular cyclization of electron-rich a-aryl ketones. The alkoxy substituent on the benzene ring In the substrates was essential for an efficient cyclization to occur. This novel method allows the construction of benzo[b]furan rings by joining the O-atom on the side chain to the benzene ring via direct oxidative aromatic C-O bond formation.
Potential antimalarials. XXII Some 2,4-diamino-5-(3- and 4-trifluoromethylphenyl and 3,4-methylenedioxyphenyl)pyrimidines
Barlin, Gordon B.,Kotecka, Barbara,Rieckmann, Karl H.
, p. 647 - 650 (2007/10/03)
A series of 10 pyrimethamine analogues containing 3′- and 4′-trifluoromethyl and 3′,4′-methylenedioxy groups has been prepared and tested for in vitro antimalarial activity against the FC-27 and K-1 isolates of Plasmodium falciparum. Several of these compounds were almost as active as pyrimethamine against the drug-sensitive FC-27 isolate, and like pyrimethamine, they were much less active against the drug-resistant K-1 isolate. The 4′-trifluoromethyl compunds, however, showed much smaller differences.