Sulfonamides of primary amines bearing an aromatic ring at the gamma-position were treated with (diacyloxyiodo)arenes and:iodine under irradiation conditions with;a tungsten-lamp to give the corresponding 1,2,3,4-tetrahydroquinoline derivatives in moderate to good yields. Here, the reactivity depends on the Z-group (protecting group) of the starting amides. Under the same reaction conditions, some sulfonamides were treated with (diacetoxyiodo)benzene and iodine in the presence of aromatics to give the corresponding N-arylated amides. These reactions proceed through the intramolecular and intermolecular amidations onto aromatic rings via the sulfonamidyl radicals formed.
US4490390A
申请人:——
公开号:US4490390A
公开(公告)日:1984-12-25
Photoredox‐Catalyzed Site‐Selective α‐C(sp
<sup>3</sup>
)−H Alkylation of Primary Amine Derivatives
作者:Melissa A. Ashley、Chiaki Yamauchi、John C. K. Chu、Shinya Otsuka、Hideki Yorimitsu、Tomislav Rovis
DOI:10.1002/anie.201812227
日期:2019.3.18
tertiary amines to oxidatively generate α‐amino radicals is well established, however, primary amines remain challenging because of competitive side reactions. This report describes the site‐selective α‐functionalization of primary amine derivatives through the generation of α‐amino radical intermediates. Employing visible‐light photoredoxcatalysis, primary sulfonamides are coupled with electron‐deficient
作者:Xia Hu、Guoting Zhang、Faxiang Bu、Lei Nie、Aiwen Lei
DOI:10.1021/acscatal.8b02847
日期:2018.10.5
The cross-coupling of C(sp3)–H and N–H represents one of the most straightforward approaches to construct saturated nitrogen-containing compounds. The additional oxidants or halogenated reagents are generally required in such processes. Herein, we developed an electrochemical oxidative intramolecularC(sp3)–Hamination of amides by employing a carbon rod anode and a platinum plate cathode in an undivided