Mild CH Halogenation of Anilides and the Isolation of an Unusual Palladium(I)-Palladium(II) Species
作者:Robin B. Bedford、Mairi F. Haddow、Charlotte J. Mitchell、Ruth L. Webster
DOI:10.1002/anie.201101606
日期:2011.6.6
Reducing the load: A facile palladium‐catalyzed ortho‐selective bromination and chlorination of anilides occurs under aerobic conditions at room temperature when N‐halosuccinimides (NXS) are used in the presence of p‐toluenesulfonic acid (PTSA). The orthopalladated PTSA complex is not only catalytically competent but also undergoes a reductive process to yield an unusual PdI–PdII tetramer (see structure;
减少负荷:在有氧条件下,在对甲苯磺酸(PTSA)的存在下使用N-卤代琥珀酰亚胺(NXS)时,在室温下好氧条件下,钯的催化邻位溴化和氯离子氯化很容易进行。正统的PTSA配合物不仅具有催化能力,而且还经过还原过程生成不寻常的Pd I –Pd II四聚体(见结构; Pd绿色,O红色,S黄色和C灰色)。