A Highly Selective Palladium-Catalyzed Aerobic Oxidative Aniline–Aniline Cross-Coupling Reaction
作者:Kenji Matsumoto、Satoshi Takeda、Tsukasa Hirokane、Masahiro Yoshida
DOI:10.1021/acs.orglett.9b02527
日期:2019.9.20
The first catalytic oxidative aniline-aniline cross-coupling reaction using oxygen as the terminal oxidant is reported. Anilines possessing a pyrrolidino group can be preferentially oxidized under mild aerobic conditions and reacted with other anilines to afford a variety of nonsymmetrical 2-aminobiphenyls with high selectivities. A heterogeneous palladium catalyst is used for the dehydrogenative cross-coupling
Abstract A practical, rapid, and efficient reaction using microreactors for the direct N-alkylation from anilinederivatives and alkyl dihalides has been achieved in the presence of aqueous potassium carbonate at an elevated temperature. This improved synthetic methodology provides a straightforward microfluid approach to the synthesis of a variety of N-aryl azacycloalkanes. GRAPHICAL ABSTRACT