New cinchonium salts bearing 5,5′-bis(methyl)-2,2′-bipyridine 1 group show solvent/substitution-dependent reversal of enantioselectivity. When used as chiral phase transfer catalyst in the asymmetric Michaeladdition of chalcones with diethylmalonate within two hours these catalysts result in high chemical yield (up to 98%) and enantiomeric excess (up to 99%) under lower concentrations of base and cold
[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.
Antimalarial Alkoxylated and Hydroxylated Chalones: Structure−Activity Relationship Analysis
作者:Mei Liu、Prapon Wilairat、Mei-Lin Go
DOI:10.1021/jm0101747
日期:2001.12.1
among the active compounds. Hydroxylatedchalcones were less active than the corresponding alkoxylated analogues. When evaluated in vivo, 8 and 208 were comparable to chloroquine in extending the lifespan of infected mice. Multivariate data analysis showed that in vitro activity was mainly determined by the properties of ring B. Quantitative structure-activityrelationship models with satisfactory predictive
Photoredox-Catalyzed Cyclopropanation of Michael Acceptors
作者:Ana M. del Hoyo、Marcos García Suero
DOI:10.1002/ejoc.201601604
日期:2017.4.18
A new protocol for the catalytic cyclopropanation of α,β-unsaturated carbonyl compounds with diiodomethane by means of photoredox catalysis has been successfully developed. The transformation is characterized by its mild conditions, functional group compatibility, and excellent selectivity profile.
A facile approach to highly functional trisubstituted furans via intramolecular Wittig reactions
作者:Ko-Wei Chen、Siang-en Syu、Yeong-Jiunn Jang、Wenwei Lin
DOI:10.1039/c0ob00912a
日期:——
An efficient and mild synthesis of trisubstituted furans, starting from α,β-unsaturated ketones, tributylphosphine, and acyl chlorides, is described. The strategy employs the intramolecular Wittig protocol as a key step to install the crucial furan ring, leading to a wide variety of highly functional furans in one step.