An immunoassay‐based method was used to screen numerous combinations of dipoles and dipolarophiles for their ability to undergo chemoselective and biocompatible [3+2] cycloaddition reactions. The approach fulfills most of the requirements of the click concept and led to the discovery of a copper‐catalyzed reaction that generates pyrazoles from sydnone and alkyne reagents.
METHOD FOR PRODUCING PYRAZOLES, NOVEL PYRAZOLES AND APPLICATIONS THEREOF
申请人:COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
公开号:US20150368295A1
公开(公告)日:2015-12-24
A method for preparing a pyrazole of formula (I) in which R,R′ and R″ have different meanings, characterised in that it involves reacting a sydnone of formula (II) in which R and R′ have the meanings already indicated, with an alkyne of formula (III) in which R″ has the meaning already indicated, in the presence of copper, to obtain a pyrazole compound of formula (I) that is then isolated and salified if desired.
High-Throughput-Experimentation has been used to revisit the Cu-catalyzed Sydnone-Alkyne Cycloaddition reaction. The reaction has been improved and a new click-and-release reaction has been discovered.
[EN] METHOD FOR PRODUCING PYRAZOLES, NOVEL PYRAZOLES AND APPLICATIONS THEREOF<br/>[FR] PROCÉDÉ DE FABRICATION DE PYRAZOLES, NOUVEAUX PYRAZOLES ET LEURS APPLICATIONS
申请人:COMMISSARIAT ENERGIE ATOMIQUE
公开号:WO2014122407A2
公开(公告)日:2014-08-14
Procédé de préparation d'un pyrazole de formule (I): dans laquelle R,R' et R'' ont différentes significations, caractérisé en ce que l'on fait réagir une sydnone de formule (II): dans laquelle R et R' ont les significations déjà indiquées, avec un alcyne de formule (III): dans laquelle R'' a la signification déjà indiquée, en présence de cuivre, pour obtenir un composé pyrazole de formule (I) que l'on isole et salifie si désiré.