N-Acyloxyphthalimides as Nitrogen Radical Precursors in the Visible Light Photocatalyzed Room Temperature C–H Amination of Arenes and Heteroarenes
摘要:
This paper reports a room temperature visible light photocatalyzed method for the C-H amination of arenes and heteroarenes. A key enabling advance in this work is the design of N-acyloxyphthalimides as precursors to nitrogen-based radical intermediates for these transformations. A broad substrate scope is presented, including the selective meta-amination of pyridine derivatives. A radical aromatic substitution mechanism is proposed.
Effect of halogen on the reaction of 1-methylpyrrole with -haloimides.
作者:Michael De Rosa、Gustavo Cabrera Nieto
DOI:10.1016/s0040-4039(00)87893-4
日期:1988.1
In the reaction of -haloimides with 1-methylpyrrole, σ-substitution (addition-elimination) predominates over halogenation, when the halogen is chlorine.
One-Pot Synthesis of Pyrrolylamides and Pyrrolylimides by Tin- and Indium-Mediated Reductive Acylation of 2- and 3-Nitropyrroles
作者:Gordon Gribble、Liangfeng Fu
DOI:10.1055/s-2008-1032170
日期:2008.3
A one-pot synthesis of pyrrolylamides and pyrrolylimides from nitropyrroles via reductive acylation under mild conditions in moderate to excellent yields is described.
First synthesis of 2-aminopyrrole and simple 1-substituted-2-aminopyrroles. Observation of fast proton exchange at C-5.
作者:Michael De Rosa、Roy P. Issac、Gregory Houghton
DOI:10.1016/0040-4039(95)02019-l
日期:1995.12
N-(1-substituent-111-pyrrol-2-yl)phlhalimides can be used to prepare the previously unknown 2-aminopyrrole and 1-substituted 2-aminopyrroles which undergo fast proton exchange at C-5 in acetic acid at 25 °C.
Visible-Light-Driven C–H Imidation of Arenes and Heteroarenes by a Phosphonium Ylide Organophotoredox Catalyst: Application to C–H Functionalization of Alkenes
作者:Yasunori Toda、Toya Kobayashi、Fumiya Hirai、Takamichi Yano、Makoto Oikawa、Kimiya Sukegawa、Masahiro Shimizu、Fuyuki Ito、Hiroyuki Suga
DOI:10.1021/acs.joc.3c00988
日期:2023.7.7
Phosphonium ylide catalysis through an oxidative quenching cycle has been developed for visible-light-driven C–H imidation of arenes and heteroarenes. The present protocol could be applied not only to trihalomethylative lactonization reactions involving trifluoromethyl, trichloromethyl, and tribromomethyl radicals but also to the first example of an organophotoredox-catalyzed imidative lactonization