Palladium(II)-Catalyzed Tandem Synthesis of Acenes Using Carboxylic Acids as Traceless Directing Groups
作者:Kiho Kim、Dhananjayan Vasu、Honggu Im、Sungwoo Hong
DOI:10.1002/anie.201603661
日期:2016.7.18
straightforward synthetic strategy for generating useful anthracene derivatives was developed involving palladium(II)‐catalyzed tandem transformation with carboxylicacids as tracelessdirectinggroups. Carboxyl‐directed C‐H alkenylation, carboxyl‐directed secondary C‐H activation and rollover, intramolecular C−C bond formation, and decarboxylative aromatization are proposed as the key steps in the tandem
Compounds of formula Ia and Ib
wherein A, B, C and R
1
are described herein.
其中A,B,C和R1所描述的式子Ia和Ib的化合物。
Palladium‐Catalyzed Enantioselective Isodesmic C–H Iodination of Phenylacetic Weinreb Amides
作者:Hang Wang、Chunlin Zhou、Zezhong Gao、Shangda Li、Gang Li
DOI:10.1002/anie.202300905
日期:——
Isodesmic reactions represent mild alternatives to other chemical transformations that require harsh oxidizing agents or highly reactive intermediates. However, enantioselective isodesmic C−Hfunctionalization is unknown. Herein, an unprecedented highly enantioselective isodesmic C−Hfunctionalization to access chiral iodinated phenylacetic Weinrebamides via desymmetrization and kinetic resolution