A Practical and User-Friendly Method for the Selenium-Free One-Step Preparation of 1,2-Diketones and their Monoxime Analogs
作者:Georg Rüedi、Matthias A. Oberli、Matthias Nagel、Christophe Weymuth、Hans-Jürgen Hansen
DOI:10.1055/s-2004-832815
日期:——
Treatment of α-methylene ketones with excess sodium nitrite and aqueous HCl in THF at reduced temperatures provides an effective tool for the preparation of a variety of 1,2-diketones. The diastereoselective synthesis of the corresponding (Z)-1,2-dione monoximes could be accomplished under similar conditions, but by using only one equivalent of nitrosatingreagent.
Unsymmetrical α -diketones have been obtained via cross coupling of acyltins with acylhalides under PdCl2(PPh3)2 catalysis while symmetrical α -diketones have been readily obtained via “in situ” formation of acyltins using hexabutylditin and acyl chlorides under similar experimental conditions.
[EN] COMPOUNDS AND PHARMACEUTICAL COMPOSITIONS FOR TREATING DISORDERS ASSOCIATED WITH THE 5-HT1A AND 5-HT2A RECEPTORS<br/>[FR] COMPOSÉS ET COMPOSITIONS PHARMACEUTIQUES POUR TRAITER DES TROUBLES ASSOCIÉS AUX RÉCEPTEURS 5-HT1A ET 5-HT2A
申请人:ACHE LAB FARMACEUTICOS SA
公开号:WO2012037634A1
公开(公告)日:2012-03-29
This invention is related to the alkyl-piperazine-phenyl 4 (3H)-quinazolinones general formula (I) compounds, pharmacologicaly active and able to act on the 5-HT1A and 5-HT2A serotonin receptors in a manner that promotes the control, relief or cure of disorders associated with these receptors, and pharmaceutical compositions containing the compounds for the treatment of disorders associated with these receptors. These compounds and their pharmaceutical compositions are useful in the treatment of conditions such as depression, anxiety, phobias, addictions, aggressiveness, impulsiveness, panic, psychotic, eating and sleep disorders, obsessive-compulsive disorder and female sexual dysfunctions, among other disorders associated with these receptors.
METHOD FOR PRODUCING FLUOROPOLYMER, POLYTETRAFLUOROETHYLENE COMPOSITION, AND POLYTETRAFLUOROETHYLENE POWDER
申请人:Daikin Industries, Ltd.
公开号:EP4006063A1
公开(公告)日:2022-06-01
Provided is a method for producing a fluoropolymer, including a polymerization step of polymerizing a fluoromonomer in an aqueous medium having a pH of 4.0 or more in the presence of a hydrocarbon surfactant and a polymerization initiator to obtain a fluoropolymer.