inexpensive, nontoxic manganese catalyst enabled unprecedented redox‐neutral carbonylative annulations under ambient pressure. The manganese catalyst outperformed all other typically used base and precious‐metal catalysts. The outstanding versatility of the manganese catalysis manifold was reflected by ample substrate scope, setting the stage for effective late‐stage manipulations under racemization‐free
Solvent-Free Synthesis of 4<i>H</i>-Pyrido[1,2-<i>a</i>]pyrimidin-4-ones Catalyzed by BiCl<sub>3</sub>: A Green Route to a Privileged Backbone
作者:Irwan I. Roslan、Qiu-Xuan Lim、Aijuan Han、Gaik-Khuan Chuah、Stephan Jaenicke
DOI:10.1002/ejoc.201500227
日期:2015.4
An extensive array of 4H-pyrido[1,2-a]pyrimidin-4-ones have been synthesized from commercially available 2-aminopyridines and β-oxo esters with excellent yields under solvent-free conditions. The reaction, catalyzed by cheap and nontoxic BiCl3, proceeds with short reaction times under mild conditions and normal atmosphere. Only water and alcohol are formed as co-products in this green reaction.
[EN] PYRIDOPYRIMIDINONE COMPOUNDS USEFUL IN TREATING SODIUM CHANNEL-MEDIATED DISEASES OR CONDITIONS<br/>[FR] COMPOSÉS DE PYRIDOPYRIMIDINONE UTILES DANS LE TRAITEMENT DE MALADIES OU D'AFFECTIONS VÉHICULÉES PAR LES CANAUX SODIQUES
申请人:XENON PHARMACEUTICALS INC
公开号:WO2008097991A1
公开(公告)日:2008-08-14
[EN] This invention is directed to pyridopyrimidinone compounds of formula (I): wherein n, R1, R2 and R3 are as defined herein, as a stereoisomer, enantiomer, tautomer thereof or mixtures thereof; or a pharmaceutically acceptable salt, solvate or prodrug thereof, useful for the treatment and/or prevention of sodium channel-mediated diseases or conditions, such as pain. [FR] L'invention concerne des composés de pyridopyrimidinone de formule (I) : dans laquelle n, R1, R2 et R3 sont tels que définis ici, comme un stéréo-isomère, un énantiomère, un tautomère de ceux-ci ou des mélanges de ceux-ci ; ou un sel, solvate ou promédicament pharmaceutiquement acceptable de ceux-ci, utile dans le traitement et/ou la prévention de maladies ou d'affections véhiculées par les canaux sodiques, telles que la douleur.