Palladium-Catalyzed Decarboxylative sp<sup>3</sup>−sp<sup>3</sup> Coupling of Nitrobenzene Acetic Esters
作者:Shelli R. Waetzig、Jon A. Tunge
DOI:10.1021/ja077070r
日期:2007.12.1
Allylic esters of nitrobenzene acetic acids undergo facile palladium-catalyzed decarboxylative coupling. Both mono- and dinitroarene substrates give high yields of the coupled products. Moreover, the rates of the reactions suggest that decarboxylation is rate-limiting and substrates that sterically disfavor attainment of the reactive conformation for decarboxylation are not viable. Finally, reduction
硝基苯乙酸的烯丙酯容易发生钯催化的脱羧偶联。单硝基芳烃和二硝基芳烃底物都能产生高产率的偶联产物。此外,反应速率表明脱羧是限速的,并且空间上不利于获得脱羧反应构象的底物是不可行的。最后,将产物硝基芳烃还原成相应的苯胺,可以得到多种杂环,包括喹啉和二氢喹诺酮。