Palladium(II)-Catalyzed C(sp<sup>2</sup>)–H Bond Activation/C–N Bond Cleavage Annulation of <i>N</i>-Methoxy Amides and Arynes
作者:Xiu-Fen Cheng、Ting Yu、Yi Liu、Nan Wang、Zhenzhen Chen、Guang-Lu Zhang、Lili Tong、Bo Tang
DOI:10.1021/acs.orglett.2c00161
日期:2022.3.25
The Pd(II)-catalyzed C–H bond activation/C–N bond cleavage annulation reaction of N-alkyoxyamide aryne is developed to synthesize 9,10-dihydrophenanthrenone derivatives. This reaction exhibited good functional group compatibility with yields up to 92%. Detailed mechanistic studies showed that the key to C–N bond cleavage is the formed eight-membered palladacycle intermediate undergoing nucleophilic
开发了 Pd(II) 催化的 N-烷氧基酰胺芳烃的 C-H 键活化/C- N键裂解环化反应以合成 9,10-二氢菲酮衍生物。该反应表现出良好的官能团相容性,产率高达 92%。详细的机理研究表明,C-N键断裂的关键是形成的八元钯环中间体与羰基进行亲核加成,这为N-烷氧基酰胺定向C-H键活化提供了一种新的实用途径。