Direct Ortho-Acetoxylation of Anilides via Palladium-Catalyzed sp<sup>2</sup> C−H Bond Oxidative Activation
作者:Guan-Wu Wang、Ting-Ting Yuan、Xue-Liang Wu
DOI:10.1021/jo8003088
日期:2008.6.1
Various anilides have been directly ortho-acetoxylated through a Pd(OAc)2-catalyzed C−Hbond activation process. The amide group in anilides was found to functionalize as an elegant directing group to convert aromatic sp2 C−H bonds into C−O bonds in high regioselectivity with acetic acid as the acetate source and K2S2O8 as the oxidant.
通过Pd(OAc)2催化的CH键活化过程,各种苯甲酸酯已直接被邻乙酰氧基化。发现在苯甲酸酯中的酰胺基团作为优雅的引导基团起作用,以乙酸为乙酸盐源和K 2 S 2 O 8为氧化剂以高区域选择性将芳族sp 2 C-H键转变为C-O键。
The chemistry of trisulphenamides [N(SR)3]. Part I. Preparation, thermal decomposition, and reactions of tribenzenesulphenamide [N(SPh)3]
作者:Derek H. R. Barton、Ian A. Blair、Philip D. Magnus、Robert K. Norris
DOI:10.1039/p19730001031
日期:——
acetic anhydride gave tribenzenesulphenamide [N(SPh)3]. Decomposition of this substance at ca. 80° gave nitrogen and diphenyl disulphide in quantitative yields. Phenols react with tribenzenesulphenamide to give quinone phenylthioimines. Where both ortho- and para-positions in the phenol are available for substitution, ortho-substitution predominates. The mechanism of this reaction involves initial H·