PROCESS FOR PREPARING A PROPIOLIC ACID OR A DERIVATIVE THEREOF
申请人:Goossen Lukas J
公开号:US20140012000A1
公开(公告)日:2014-01-09
The invention relates to a process for preparing a propiolic acid or a derivative thereof by reacting a terminal alkyne with carbon dioxide, which comprises performing the reaction in the presence of a base and a copper complex, especially a copper (I) complex having at least one ligand, at least one of the ligands of the copper complex being selected from monodentate ligands which have an aminic or iminic nitrogen atom capable of coordination with copper, and polydentate ligands having at least two atoms or atom groups which are capable of simultaneous coordination with copper and are selected from nitrogen, oxygen, sulfur, phosphorus and carbene carbon.
Synthesis of Propiolic Acids via Copper-Catalyzed Insertion of Carbon Dioxide into the CH Bond of Terminal Alkynes
作者:Lukas J. Gooßen、Nuria Rodríguez、Filipe Manjolinho、Paul P. Lange
DOI:10.1002/adsc.201000564
日期:2010.11.22
A highly effective copper catalyst has been developed that promotes the insertion of carbondioxide into the CH bond of terminal alkynes under unprecedentedly mild conditions. For the first time, propiolic acids can thus be synthesized in excellent yields from alkynes and carbondioxide in the presence of the mild base cesium carbonate. The catalyst, (4,7-diphenyl-1,10-phenanthroline)bis[tris(4-fl
One-Pot Synthesis of 2-<i>R</i>-Naphtho[2,3-<i>b</i>]thiophene-4,9-diones via Cyclization of 2-(<i>R</i>-Ethynyl)-1,4-naphthoquinones with Na<sub>2</sub>S<sub>2</sub>O<sub>3</sub>
作者:Denis S. Baranov、Alexander A. Popov、Danil A. Nevostruev、Alexey A. Dmitriev、Yurii V. Gatilov、Elena S. Kobeleva
DOI:10.1021/acs.joc.1c00852
日期:2021.9.3
The concise and efficient one-pot synthesis of 2-R-naphtho[2,3-b]thiophene-4,9-diones from 2-bromo-1,4-naphthoquinone and alkynes has been developed. The reaction proceeds through the formation of 2-(R-ethynyl)-1,4-naphthoquinones, which undergo transformation with Na2S2O3 to 2-R-naphtho[2,3-b]thiophene-4,9-diones via C–H sulfuration, accompanied by the formation of the aromatic Bunte salt, followed
已经开发了从 2-溴-1,4-萘醌和炔烃中简明高效地一锅法合成 2- R-萘并[2,3 - b ]噻吩-4,9-二酮的方法。该反应通过形成 2-( R -乙炔基)-1,4-萘醌,其与 Na 2 S 2 O 3转化为 2- R -萘并[2,3- b ]噻吩-4,9-二酮通过 C-H 硫化,伴随着芳香族 Bunte 盐的形成,然后是空气氧化和 5-endo-dig 环化。该协议的特点是简单、对官能团具有良好的耐受性、相对温和的条件和市售的起始化合物。
1,5-Disubstituted 1,2,3-triazoles as cis-restricted analogues of combretastatin A-4: Synthesis, molecular modeling and evaluation as cytotoxic agents and inhibitors of tubulin
作者:Kristin Odlo、Jean Hentzen、Jérémie Fournier dit Chabert、Sylvie Ducki、Osman A.B.S.M. Gani、Ingebrigt Sylte、Martina Skrede、Vivi Ann Flørenes、Trond Vidar Hansen
DOI:10.1016/j.bmc.2008.03.049
日期:2008.5
1,5-disubstituted 1,2,3-triazole analogues of combretastatinA-4 (1) have been prepared. The triazole 12f, 2-methoxy-5-(1-(3,4,5-trimethoxyphenyl)-1H-1,2,3-triazol-5-yl)aniline, displayed potent cytotoxicactivity against several cancer cell lines with IC(50) values in the nanomolar range. The ability of triazoles to inhibit tubulin polymerization has been evaluated, and 12f inhibited tubulin polymerization
[EN] ISONICOTINAMIDE OREXIN RECEPTOR ANTAGONISTS<br/>[FR] ANTAGONISTES D'ISONICOTINAMIDE DES RÉCEPTEURS DE L'OREXINE
申请人:MERCK SHARP & DOHME
公开号:WO2010051236A1
公开(公告)日:2010-05-06
The present invention is directed to isonicotinamide compounds which are antagonists of orexin receptors, and which are useful in the treatment or prevention of neurological and psychiatric disorders and diseases in which orexin receptors are involved. The invention is also directed to pharmaceutical compositions comprising these compounds and the use of these compounds and compositions in the prevention or treatment of such diseases in which orexin receptors are involved.