o-Benzenedisulfonimide, a new strong bench-stable Brønsted acid, has been shown to efficiently catalyze the Mukaiyama aldol reaction of aldehydes or dimethyl acetals with silyl enol ethers under mild solvent-free reaction conditions.
Synthesis and Evaluation of Estrogen Agonism of Diaryl 4,5-Dihydroisoxazoles, 3-Hydroxyketones, 3-Methoxyketones, and 1,3-Diketones: A Compound Set Forming a 4D Molecular Library
作者:Juha T. Pulkkinen、Paavo Honkakoski、Mikael Peräkylä、Istvan Berczi、Reino Laatikainen
DOI:10.1021/jm8001795
日期:2008.6.1
In this paper, the preparation and systematic evaluation of estrogen receptor alpha (ER alpha) and estrogen receptor beta (ER beta) activities of some diaryl-1,3-diones and their synthetic intermediates, diaryl-4,5-dihydroisoxazoles, diaryl-3-hydroxyketones, diaryl-3-methoxyketones, and diaryl-2-(dimethyl-lambda(4)-sulfanylidene)-1,3-diones, is described. The set of 72 compounds constitutes a general schematic structure aryl1-linker1-spacer-linker2-aryl2, where the linker1-spacer-linker2 length varies between 4 and 8 carbons. The set of compounds was applied here to map and explore the active sites of subtypes ER alpha and ER beta. The highest activities were obtained with dihydroisoxazole and hydroxyketone spacers, but even the most flexible diones with unsubstituted aryl groups showed some agonism. Most compounds were found to be ER alpha selective or to activate both receptors, but in some cases we saw also clearly stronger ER beta activation.
NOVEL BETA-HYDROXYKETONES AND BETA-ALKOXYKETONES WITH ESTROGENIC ACTIVITY
申请人:Pulkkinen, Juha
公开号:EP2227449A1
公开(公告)日:2010-09-15
[EN] NOVEL BETA-HYDROXYKETONES AND BETA-ALKOXYKETONES WITH ESTROGENIC ACTIVITY<br/>[FR] NOUVELLES BÊTA-HYDROXYCÉTONES ET BÊTA-ALCOXYCÉTONES PRÉSENTANT UNE ACTIVITÉ OESTROGÉNIQUE
申请人:PULKKINEN JUHA
公开号:WO2009066008A1
公开(公告)日:2009-05-28
This invention relates to β-hydroxyketones and β-alkoxyketones of formula (I), to their use as estrogen receptor modulators, and to methods for their preparation.
Intramolecular O−H···O Hydrogen-Bond-Mediated Reversal in the Partitioning of Conformationally Restricted Triplet 1,4-Biradicals and Amplification of Diastereodifferentiation in Their Lifetimes
作者:Jarugu Narasimha Moorthy、Subhas Samanta、Apurba L. Koner、Satyajit Saha、Werner M. Nau
DOI:10.1021/ja8032179
日期:2008.10.15
reverse their partitioning between cyclization and elimination compared with the behavior of the biradicals of ketones 3; the ketones 8-anti and 9-anti underwent cyclization in benzene, predominantly leading to cyclobutanols with syn stereochemistrybetween the C2 and C3 substituents. In accordance with photoproduct profiles, an unprecedented approximately 2-fold difference in the lifetimes of the intermediate