Copper-Catalyzed Difluoromethylation of Aryl Iodides with (Difluoromethyl)zinc Reagent
作者:Hiroki Serizawa、Koki Ishii、Kohsuke Aikawa、Koichi Mikami
DOI:10.1021/acs.orglett.6b01733
日期:2016.8.5
diethylzinc can readily lead to (difluoromethyl)zinc reagents. Therefore, the first copper-catalyzed difluoromethylation of aryl iodides with the zinc reagents is accomplished to afford the difluoromethylated arenes. The reaction proceeds efficiently through the ligand/activator-free operation without addition of ligands for copper catalyst (e.g., phen and bpy) and activators for zinc reagent (e.g., KF
二氟碘甲烷与锌粉或二乙基锌的组合可轻易产生(二氟甲基)锌试剂。因此,完成了用锌试剂的第一铜催化的芳基碘化物的二氟甲基化,以提供二氟甲基化的芳烃。反应有效地进行通过所述配体/免费活化剂-操作不添加配体的铜催化剂(的例如,苯和联吡啶)和活化剂为锌试剂(É。克。,KF,CsF和NaO-吨-Bu)。此外,CF 2 H基团从锌试剂到铜催化剂的重金属化甚至在室温下也进行以形成铜酸盐[Cu(CF 2 H)2 ] -。