Sterically Controlled, Palladium-Catalyzed Intermolecular Amination of Arenes
作者:Ruja Shrestha、Paramita Mukherjee、Yichen Tan、Zachary C. Litman、John F. Hartwig
DOI:10.1021/ja4032677
日期:2013.6.12
the Pd-catalyzed amination of arenes to form N-aryl phthalimides with regioselectivity controlled predominantly by steric effects. Mono-, di-, and trisubstituted arenes lacking a directing group undergo amination reactions with moderate to high yields and high regioselectivities from sequential addition of PhI(OAc)2 as an oxidant in the presence of Pd(OAc)2 as catalyst. This sterically derived selectivity
In this study, a visible-light-induced intermolecular C-H bond imidation of arenes was achieved at ambient condition. By using simple phthalimide with (diacetoxyiodo)benzene and molecular iodine, direct metal-/photocatalyst-free C-N bond formation was achieved. The imidation protocol was designed by using time-dependent density functional theory calculations and experimentally demonstrated for 28 substrates
Intermolecular Oxidative C–N Bond Formation under Metal-Free Conditions: Control of Chemoselectivity between Aryl sp<sup>2</sup> and Benzylic sp<sup>3</sup> C–H Bond Imidation
作者:Hyun Jin Kim、Jiyu Kim、Seung Hwan Cho、Sukbok Chang
DOI:10.1021/ja207296y
日期:2011.10.19
A new synthetic approach toward intermolecular oxidative C-N bond formation of arenes has been developed under transition-metal-free conditions. Complete control of chemoselectivity between aryl sp(2) and benzylic sp(3) C-H bond imidation was achieved by the choice of nitrogen sources, representatively being phthalimide and dibenzenesulfonimide, respectively.