Organocatalytic Route to Dihydrocoumarins and Dihydroquinolinones in All Stereochemical Configurations
摘要:
A straightforward stereodivergent route to dihydrocoumarins and dihydroquinolinones based on cinchona alkaloid catalyzed addition reactions of monothiomalonates (MTMs) to functionalized nitroolefins followed by deprotection and chemoselective cyclization has been developed. The synthesis proceeds under mild conditions and yields heterocycles with adjacent quaternary and tertiary stereogenic centers in very high yields and stereoselectivities. Moreover, full control over the relative and absolute configuration is achieved by the use of (pseudo)enantiomeric catalysts and the difference in reactivity of thioester versus oxoester moieties.
[EN] NOVEL CHROMEN-2-ONE BASED HYDROXAMIC ACID DERIVATIVES HAVING ANTI-INFLAMMATORY ACTIVITY, THE PREPARATION THEREOF AND A COMPOSITION CONTAINING THE SAME FOR TREATING INFLAMMATORY DISEASE<br/>[FR] NOUVEAUX DERIVES D'ACIDE HYDROXAMIQUE A BASE DE CHROMENE-2-ONE QUI PRESENTENT UNE ACTIVITE ANTI-INFLAMMATOIRE, PREPARATION DE CEUX-CI ET COMPOSITION CONTENANT CEUX-CI, UTILISEE POUR TRAITER DES MALADIES INFLAMMATOIRES
申请人:JEIL PHARMACEUTICAL CO LTD
公开号:WO2007008037A1
公开(公告)日:2007-01-18
[EN] The present invention relates to novel chromen-2-one based hydroxamic acid derivatives having anti-inflammatory activity, the preparation thereof and a composition containing the same for treating inflammatory disease. [FR] La présente invention concerne de nouveaux dérivés d'acide hydroxamique à base de chromène-2-one qui présentent une activité anti-inflammatoire, ainsi que la préparation de ceux-ci et une composition contenant ceux-ci, utilisée pour traiter des maladies inflammatoires.