Synthesis of Chromones via Palladium-Catalyzed Ligand-Free Cyclocarbonylation of <i>o</i>-Iodophenols with Terminal Acetylenes in Phosphonium Salt Ionic Liquids
作者:Qian Yang、Howard Alper
DOI:10.1021/jo902210p
日期:2010.2.5
The highly efficient and selective palladium-catalyzed ligand-free cyclocarbonylation reaction of o-iodophenols with terminalacetylenes and CO in the phosphonium salt ionic liquid, C14H29(C6H13)3P+Br−, affords diversified chromones in good to excellent yields under atmospheric CO pressure. The ionic liquid, as the reaction medium, enhances the efficiency of the cyclocarbonylation reaction.
高效和选择性的钯催化的无配体的cyclocarbonylation的反应Ó在鏻盐离子性液体终端乙炔和CO -iodophenols,C 14 H ^ 29(C 6 H ^ 13)3 P +溴- ,得到多样化良好色酮类在常压CO压力下具有出色的产量。作为反应介质的离子液体提高了环羰基化反应的效率。