Substituted 2-phenyl-4-quinolone-3-carboxylic acid compounds and their use as antitumor agents
申请人:Kuo Sheng-Chu
公开号:US20050032832A1
公开(公告)日:2005-02-10
Substituted 2-phenyl-4-quinolone-3-carboxylic acid derivatives and their salts were synthesized. The results of preliminary screening revealed that these compounds are potent in killing solid tumor cancers.
Preparation of <i>N</i>-Aryl Amides by Epimerization-Free Umpolung Amide Synthesis
作者:Michael S. Crocker、Zihang Deng、Jeffrey N. Johnston
DOI:10.1021/jacs.2c05986
日期:2022.9.21
enantioselective synthesis. However, its inability to forge N-aryl amides has been a longstanding problem, one limiting its application more broadly in drug development where α-chiral N-aryl amides are increasingly common. We report here the reaction of α-fluoronitroalkanes and N-aryl hydroxyl amines for the direct synthesis of N-aryl amides using a simple Brønsted base as the promoter. No other activating
Role of Hetero-Halogen (F···X, X = Cl, Br, and I) or Homo-Halogen (X···X, X = F, Cl, Br, and I) Interactions in Substituted Benzanilides
作者:Susanta K. Nayak、M. Kishore Reddy、Tayur N. Guru Row、Deepak Chopra
DOI:10.1021/cg101544z
日期:2011.5.4
A series of halogen-substituted benzanilides have been synthesized and characterized, and crystallization studies directed toward generation of polymorphs have been performed to delineate the importance of interactions involving halogens. The effect of halogen substitution on the molecular conformation and supramolecular packing has been investigated. The N-H center dot center dot center dot O H-bond is a key structure-directing element acting in conjunction with C-H center dot center dot center dot O and C-H center dot center dot center dot pi interactions. In addition, it is of importance to note that organic fluorine prefers Type I F center dot center dot center dot F contacts, whereas Cl, Br, and I prefer Type II contacts. Hetero-halogen center dot center dot center dot halogen interactions on the other hand are predominately of Type II geometry, and this is due to the greater polarizability of the electron density associated with the heavier halogens. It is of importance to evaluate the contributing role of these interactions in crystal structure packing and the co-operativity associated with such interactions in the solid state.
Synthesis of 2-Aminophenols and Heterocycles by Ru-Catalyzed C–H Mono- and Dihydroxylation
作者:Xinglin Yang、Gang Shan、Yu Rao
DOI:10.1021/ol400437a
日期:2013.5.17
A novel and efficient synthesis of 2-aminophenols, 2-aminobenzene-1,3-diols, and heterocycles through Ru-catalyzed C-H mono- and dihydroxylation of anilides has been developed with a new directing group strategy. The reaction demonstrates excellent reactivity, regioselectivity, good functional group tolerance, and high yields.