Copper-Mediated Selective C–H Activation and Cross-Dehydrogenative C–N Coupling of 2′-Aminoacetophenones
摘要:
Isatins were obtained by cross-dehydrogenative C-N annulation and dealkylative C-N annulation of 2'-N-aryl/alkylaminoacetophenones and 2'-N,N-dialkylaminoacetophenones respectively in the presence of Cu(OAc)(2)center dot H2O/NaOAc/air. However, on reaction with CuBr, 2'-N-benzylaminoacetophenones underwent selective oxidation of an a-methylene group of amine rather than the 2-acetyl group to provide corresponding benzamides exclusively. Base played an important role in selective oxidation by lowering the temperature and time.
The alkylation of 2-phenyl-4-quinolones was investigated and showed that the N-alkylation versus O-alkylation is highly dependent on whether C-5 is hydroxylated or not. N-Alkylation is favoured by the presence of a 5-hydroxyl group. The synthetic and the NMR structural studies are reported.
Synthesis and antitumor activity of novel 4-aminoquinoline derivatives
作者:Jie Ren、Juan Zhao、Yong-Sheng Zhou、Xian-Hua Liu、Xin Chen、Kun Hu
DOI:10.1007/s00044-012-0283-8
日期:2013.6
AbstractA series of novel 4-aminoquinolinederivatives were synthesized as antitumor agents by reacting 4-chloroquinoline with the corresponding mono/dialkyl amines. The cytotoxicity of these compounds was evaluated in vitro against HCT-116, A549, DU-145, HepG2, and LN229 cell lines. The results showed that most of the synthesized compounds displayed excellent cytotoxicity, and 5,7-dimethoxy-2-phe
Weakly Coordinating, Ketone-Directed (η<sup>5</sup>
-Pentamethylcyclopentadienyl)cobalt(III)- and (η<sup>5</sup>
-Pentamethylcyclopentadienyl)rhodium(III)-Catalyzed C−H Amidation of Arenes: A Route to Acridone Alkaloids
作者:Sourav Sekhar Bera、Md Raja Sk、Modhu Sudan Maji
DOI:10.1002/chem.201805376
日期:2019.2.1
monoamidation of aromatic ketones, chalcone, carbazole, and benzophenones was achieved by employing high‐valent cobalt and rhodium catalysis to access numerous biologically important molecular building blocks. This amidation proceeded smoothly with a variety of ketones and several amidating partners. The application of the products in the synthesis of various heterocycles, including acridones, indoles, quinoline
Antimitotic Activity of 5-Hydroxy-7-methoxy-2-phenyl-4-quinolones
作者:Mohamed Hadjeri、Eva-Laure Peiller、Chantal Beney、Nabajyoti Deka、Martin A. Lawson、Charles Dumontet、Ahcène Boumendjel
DOI:10.1021/jm049876x
日期:2004.9.1
We report the synthesis of 5-hydroxy-7-methoxy-2-phenyl-4-quinolones and their biological activity as antitumor agents. These molecules were initially evaluated for their ability to induce cell cycle arrest in the G2/M phase. Compounds that showed significant G2/M cell cycle arrest were tested for antiproliferative activity using both the MTT assay and the NCI in vitro 60 cell line human tumor screen. The 5-hydroxy-7-methoxy-2-phenyl-4-quinolone (3a) and 2-(3-fluorophenyl)-5-hydroxy-7-methoxy-4-quinolone (3f) were the most active in the cell cycle arrest test whereas 3f was found to be the most active in the MTT assay. In terms of structural requirements, we found that the presence of a 5-hydroxyl group, a 7-methoxy group, and an unsubstituted N1 were essential for the antimitotic activity. In accordance with the literature, a fluoro group at the 3'- or 2'-position and a methoxy or a chloro group at the 3'-position were found to be highly advantageous for both the cell cycle arrest and the antiproliferative activities.
Hadjeri, Mohamed; Mariotte, Anne-Marie; Boumendjel, Ahcene, Journal of Chemical Research - Part S, 2002, # 9, p. 463 - 464