Synthesis of Substituted <i>N</i>-Benzyl Pyridones via an <i>O</i>- to <i>N</i>-Alkyl Migration
作者:Erica L. Lanni、Michael A. Bosscher、Bartel D. Ooms、Christina A. Shandro、Bruce A. Ellsworth、Carolyn E. Anderson
DOI:10.1021/jo800866w
日期:2008.8.1
A new LiI-promoted O- to N-alkyl migration has been developed for the conversion of O-alkylated 2-hydroxy pyridines, quinolines, and pyrimidines to the corresponding N-alkylated heterocycles in good to excellent yields (57−99%). This method serves as an efficient means for the preparation of N-benzyl pyridones, quinolones, and pyrimidones.
Iodine-Catalyzed Oxidative Functionalization of Azaarenes with Benzylic C(sp<sup>3</sup>)–H Bonds via N-Alkylation/Amidation Cascade: Two-Step Synthesis of Isoindolo[2,1-<i>b</i>]isoquinolin-7(5<i>H</i>)-one
作者:Wen-Kun Luo、Xin Shi、Wang Zhou、Luo Yang
DOI:10.1021/acs.orglett.6b00646
日期:2016.5.6
An efficient and practical iodine-catalyzed oxidative functionalization of azaarenes with benzylicC–Hbonds via an N-alkylation and amidation cascade is developed to provide isoquinolin-1(2H)-ones. This method utilizes readily available unfunctionalized azaarenes and methylarenes as starting materials and proceeds under metal-free conditions with good to excellent yields, avoiding the use of expensive
通过N-烷基化和酰胺化级联反应,开发了一种有效且实用的碘催化的氮杂芳烃与苄基CH键的氧化功能化反应,以提供异喹啉-1(2 H)-one。该方法利用容易获得的未官能化的氮杂芳烃和甲基芳烃作为起始原料,并在无金属条件下以良好或优异的收率进行,避免了使用昂贵的贵金属催化剂以及避免产生卤化物和金属废物。该反应的合成效用以异吲哚并[2,1 - b ]异喹啉-7(5 H)-one的简明两步合成为例。
Copper-Mediated Oxidative Functionalization of C(sp<sup>3</sup>)–H Bonds with Isoquinolines: Two-Step Synthesis of 5-Oxaprotoberberinones
作者:Dingyi Wang、Rongxing Zhang、Ruihong Deng、Sen Lin、Shengmei Guo、Zhaohua Yan
DOI:10.1021/acs.joc.6b02145
日期:2016.11.18
functionalization of C(sp3)–H bonds with isoquinolines via a radicalprocess without ligands was achieved. The present system exhibits a novel pathway for the preparation of N-alkyl (benzyl) isoquinolin-1(2H)-ones in moderate to high yields. In addition, this procedure provides a simple method to afford 5-oxaprotoberberinones and their derivatives in two steps.
The regioselective iodination of quinolines, quinolones, pyridones, pyridines and uracil
作者:Uttam Dutta、Arghya Deb、David W. Lupton、Debabrata Maiti
DOI:10.1039/c5cc07799k
日期:——
A radical based direct C-H iodination protocol for quinolines, quinolones, pyridones, pyridines, and uracil has been developed. The iodination occurs in a C3 selective manner for quinolines and quinolones. Pyridones...
Light-driven selective aerobic oxidation of (iso)quinoliniums and related heterocycles
作者:Meimei Zhou、Keyang Yu、Jianxin Liu、Weimei Shi、Yingming Pan、Haitao Tang、Xiangjun Peng、Qian Liu、Hengshan Wang
DOI:10.1039/d1ra01226f
日期:——
Selective C1–H/C4–H carbonylation of N-methylene iminium salts, catalyzed by visible-light photoredox and oxygen in the air, has been reported. A ruthenium complex acts as a chemical switch to conduct two different reaction pathways and to afford two different kinds of products. In the absence of the ruthenium complex, the Csp2–H bondsadjacent to the nitrogenatoms are oxidized to α-lactams by the