A route to aryl-substituted quinolines from N-tosyl 1-azadienes is described. The key steps are a [4+2] cycloaddition with benzyne followed by base treatment of the 1,4-dihydroquinoline product. The N-tosyl 1-azadienes were prepared from readily accessible cinnamaldehyde and chalcone substrates by condensation with p-TsNH2. Supplemental materials are available for this article. Go to the publisher's online edition of Synthetic Communications (R) to view the free supplemental file.
A New and Direct Synthesis of Chalcones Via TFAA-H3PO4 Mediated C-C Bond Forming Reaction
作者:Kavitha Kankanala、Lingam Venkata Reddy、Vangala Ranga Reddy、Khagga Mukkanti、Sarbani Pal
DOI:10.2174/157017811794557750
日期:2011.1.1
A number of α,β-unsaturated carboxylic acids were reacted with electron rich arenes or heteroarene in the presence of trifluoroacetic anhydride (TFAA) and H3PO4 at room temperature to give a variety of chalcone derivatives in good to excellent yields. The methodology was used to prepare novel compounds of potential pharmacological significances.
Effects of Structural and Electronic Characteristics of Chalcones on the Activation of Peroxisome Proliferator-Activated Receptor Gamma
作者:Jason Taylor Schott、Charles Edward Mordaunt、Anthony Joseph Vargas、Martin Antonio Leon、Kevin Hsinwen Chen、Mandeep Singh、Mikiko Satoh、Emilio Leal Cardenas、Santanu Maitra、Nilay Vinod Patel、Hubrecht Johan Peter de Lijser
DOI:10.1248/cpb.c12-00749
日期:——
chalcones with an electron rich group or sterically large groups such as naphthyl on the carbonyl side tend to activate PPARγ. The absence of any strict structural or electronic requirements suggests that the flexibility of the PPARγ ligand binding pocket may allow binding of diverse chalcones with some preference for a slightly larger electron-rich group on the carbonyl side. We predict that further structure-activity
[EN] NUCLEAR RECEPTOR MODULATORS AND THEIR USE FOR THE TREATMENT AND PREVENTION OF CANCER<br/>[FR] MODULATEURS DE RÉCEPTEURS NUCLÉAIRES ET LEUR UTILISATION POUR LE TRAITEMENT ET LA PRÉVENTION D'UN CANCER
申请人:US HEALTH
公开号:WO2012174436A1
公开(公告)日:2012-12-20
Disclosed are compounds which are nuclear receptor modulators that can act as antagonists to the androgen receptor, for example, a compound of Formula I: wherein R1 to R5 and X1 to X5 are as described herein, as well as pharmaceutically acceptable salts, solvates, and stereoisomers thereof. Pharmaceutical compositions comprising such compounds, as well as methods of use, and treatment for cancers, including prostate cancers, other nuclear receptor mediated cancers, and other conditions, are also disclosed.
Application of natural phosphate modified with sodium nitrate in the synthesis of chalcones: a soft and clean method
作者:Saı̈d Sebti、Abderrahim Solhy、Rachid Tahir、Smahi Abdelatif、Saı̈d Boulaajaj、José A. Mayoral、José I. Garcı́a、José M. Fraile、Abdelali Kossir、Hammou Oumimoun
DOI:10.1016/s0021-9517(02)00017-9
日期:2003.1
of this solid in the Claisen–Schmidt condensation was studied and high yields were obtained with small amounts of catalyst. The reaction rate depends on the substitution in both benzaldehyde and acetophenone derivatives. The effect of the solvent, as well as the addition of water and ammonium salt, was investigated as well. The catalyst can be easily recovered and efficiently reused.
Azine-Hydrazone Tautomerism of Guanylhydrazones: Evidence for the Preference Toward the Azine Tautomer
作者:Sumit S. Chourasiya、Deepika Kathuria、Sampada S. Nikam、Ashok Ramakrishnan、Sadhika Khullar、Sanjay K. Mandal、Asit K. Chakraborti、Prasad V. Bharatam
DOI:10.1021/acs.joc.6b01258
日期:2016.9.2
using quantum chemical methods, whose tautomeric preference toward the azine tautomer is in the range of 3–8 kcal/mol. Twenty new azines were synthesized and isolated in their neutral state. Variable temperature NMR study suggests existence of the azine tautomer even at higher temperatures with no traces of the hydrazone tautomer. The crystal structures of two representative compounds confirmed that the