A new cross‐cycloaddition reaction between a wide range of isocyanides and 2‐isocyanochalcones (or analogues) was developed for the expeditious synthesis of pyrrolo[3,4‐b]indoles under thermal conditions. On the basis of the experimental results and DFT calculations, a mechanism for this domino reaction is proposed involving chemoselective heterodimerization of two different isocyanides to form 1,4‐diazabutatriene
[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.
Base‐Catalyzed Domino Isomerization/Oxidant‐Free Dehydrogenative Annulation of Allylic Alcohols: Scope, Mechanism, and Application
作者:Xiongyang Zhou、Xun Li、Cheng Le、Jia‐Qi Li
DOI:10.1002/adsc.202400465
日期:2024.8.6
A domino reaction comprising four consecutive steps based on the strategy of isomerization of allylicalcohols was developed. This base‐catalyzed protocol provided an approach for constructing polysubstituted quinolines without additional additives. A wide range of di‐ or trisubstituted γ‐aminoaryl allylicalcohols bearing alkyl or (hetero)aryl substituents were transformed to the structurally diverse
Novel Chalcone Derivatives as Potent Nrf2 Activators in Mice and Human Lung Epithelial Cells
作者:Vineet Kumar、Sarvesh Kumar、Mohammad Hassan、Hailong Wu、Rajesh K. Thimmulappa、Amit Kumar、Sunil K. Sharma、Virinder S. Parmar、Shyam Biswal、Sanjay V. Malhotra
DOI:10.1021/jm2002348
日期:2011.6.23
Nrf2-mediated activation of antioxidant response element is a central part of molecular mechanisms governing the protective function of phase II detoxification and antioxidant enzymes against carcinogenesis, oxidative stress, and inflammation. Nrf2 is sequestered in the cytoplasm by its repressor, Keap1. We have designed and synthesized novel chalcone derivatives as Nrf2 activators. The potency of these compounds was measured by the expression of Nrf2 dependent antioxidant genes GCLM, NQO1, and HO1 in human lung epithelial cells, while the cytotoxicity was analyzed using MTT assay. In vivo potency of identified lead compounds to activate Nrf2 was evaluated using a mouse model. Our studies showed 2-trifluoromethyl-2'-methoxychalone (2b) to be a potent activator of Nrf2, both in vitro and in mice. Additional experiments showed that the activation of Nrf2 by this compound is independent of reactive oxygen species or redox changes. We have discussed a quantitative structure-activity relationship and proposed a possible mechanism of Nrf2, activation.
Indium-Mediated Reductive Cyclization of 2-Nitrochalcones to Quinolines