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
Asymmetric synthesis was performed by combining a photochemical reaction of an achiral substrate followed by crystallization-induced deracemization. A fused indoline produced by the photochemical intramolecular δ-hydrogen abstraction and cyclization reaction of N-(5-chloro-2-methylphenyl)phthalimide crystallized as a racemic conglomerate, and crystallization-induced deracemization by Viedma ripening