Catalytic C(sp
<sup>3</sup>
)−H Arylation of Free Primary Amines with an
<i>exo</i>
Directing Group Generated In Situ
作者:Yan Xu、Michael C. Young、Chengpeng Wang、David M. Magness、Guangbin Dong
DOI:10.1002/anie.201604268
日期:2016.7.25
Herein, we report the palladium‐catalyzeddirectarylation of unactivated aliphatic C−H bonds in free primary amines. This method takes advantage of an exo‐imine‐type directing group (DG) that can be generated and removed in situ. A range of unprotected aliphatic amines are suitable substrates, undergoing site‐selective arylation at the γ‐position. Methyl as well as cyclic and acyclic methylene groups
Palladium-Catalyzed C(sp<sup>3</sup>
)−H Arylation of Primary Amines Using a Catalytic Alkyl Acetal to Form a Transient Directing Group
作者:Sahra St John-Campbell、Alex K. Ou、James A. Bull
DOI:10.1002/chem.201804515
日期:2018.12.3
requires derivatization at nitrogen with a directinggroup. Transientdirectinggroups (TDGs) permit C−H functionalization in a single operation, without needing these additional steps for directinggroup installation and removal. Here we report a palladium catalyzed γ‐C−H arylation of amines using catalytic amounts of alkyl acetals as transientactivators (e.g. commercially available (2,2‐dimethoxyethoxy)benzene)
Maleamic Acids That Affect Plasma Cholesterol and Penicillin Excretion
作者:Everett M. Schultz、William A. Bolhofer、Albert. Augenblick、John B. Bicking、Charles N. Habecker、J. Kenneth. Horner、Sara F. Kwong、Adolph M. Pietruszkiewicz