Nitrogen-centered radical-mediated C–H imidation of arenes and heteroarenes <i>via</i> visible light induced photocatalysis
作者:Hyejin Kim、Taehoon Kim、Dong Gil Lee、Sang Weon Roh、Chulbom Lee
DOI:10.1039/c4cc03905j
日期:——
The C-H imidation of arenes and heteroarenes has been achieved via visible light induced photocatalysis. In the presence of an iridium(III) photoredox catalyst, the reaction of aromatic substrates with N-chlorophthalimide furnishes the N-aryl products at room temperature through a nitrogen-centered radical mediated aromatic substitution.
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
Synthesis and SAR of novel, non-MPEP chemotype mGluR5 NAMs identified by functional HTS
作者:Ya Zhou、Alice L. Rodriguez、Richard Williams、C. David Weaver、P. Jeffrey Conn、Craig W. Lindsley
DOI:10.1016/j.bmcl.2009.10.059
日期:2009.12
This Letter describes the discovery and SAR of three novel series of mGluR5 non-competitive antagonists/negative allosteric modulators (NAMs) not based on manipulation of an MPEP/MTEP chemotype identified by a functional HTS approach. This work demonstrates fundamentally new mGluR5 NAM chemotypes with submicromolar potencies, and further examples of a mode of pharmacology 'switch' to provide PAMs with a non-MPEP scaffold. (C) 2009 Elsevier Ltd. All rights reserved.
Photocatalytic C–H Activation and Amination of Arenes with Nonactivated <i>N</i>-Hydroxyphthalimides Involving Phosphine-Mediated N–O Bond Scission
作者:Zhentao Pan、Bo Chen、Jingxi Fang、Tong Liu、Jiayao Fang、Yongmin Ma