Visible-light-induced photoxidation-Povarov cascade reaction: synthesis of 2-arylquinoline through alcohol and <i>N</i>-benzylanilines under mild conditions <i>via</i> Ag/g-C<sub>3</sub>N<sub>4</sub> nanometric semiconductor catalyst
作者:Peng Wang、Xiaowen Wang、Xiyu Niu、Li Zhu、Xiaoquan Yao
DOI:10.1039/d0cc00885k
日期:——
Ag/g-C3N4 nanometric semiconductor as the photocatalyst, 2-arylquinolines were synthesized through a photoxidation-Povarov cascade reaction of N-benzylanilines and alcohols under visible lightirradiation. Under the blue light of a 3 W LED, good yields were achieved for various substrates in oxygen at room temperature. This methodology provides a green and mild alternative for the formation of 2-arylquinoline
以Ag / g-C3N4纳米半导体为光催化剂,在可见光照射下,通过N-苄基苯胺和醇的光氧化-Povarov级联反应合成了2-芳基喹啉。在3 W LED的蓝光下,室温下在氧气中各种衬底的产率都很高。该方法为2-芳基喹啉衍生物的形成提供了绿色和温和的替代方法。值得注意的是,Ag / g- 纳米复合材料可以方便地回收并以令人满意的产率重复使用数次。
Facile synthesis of substituted quinolines by iron(<scp>iii</scp>)-catalyzed cascade reaction between anilines, aldehydes and nitroalkanes
作者:Sachinta Mahato、Anindita Mukherjee、Sougata Santra、Grigory V. Zyryanov、Adinath Majee
DOI:10.1039/c9ob01294j
日期:——
A library of substituted quinolines has been synthesized by the reaction of aldehydes, anilines and nitroalkanes using a catalytic amount of Fe(iii) chloride. The reaction is a simple, efficient, one-pot, three-component domino strategy in ambient air which afforded the products in high yields. A probable pathway of the reaction is a sequential aza-Henry reaction/cyclization/denitration. The use of
Three-Component Povarov Reaction with Alcohols as Alkene Precursors: Efficient Access to 2-Arylquinolines
作者:Xinjian Li、Qi Xing、Pan Li、Jingjing Zhao、Fuwei Li
DOI:10.1002/ejoc.201601343
日期:2017.1.18
An atom-economic and efficient approach to the synthesis of 2-arylquinolines has been developed. The protocol involves an iron-catalysed cascade N-alkylation/aerobic oxidation/Povarov reaction, and the desired quinolines were prepared in moderate to excellent yields from readily accessible anilines, aldehydes, and EtOH/nPrOH, with water as the only side-product. The aniline substrates also act as a
Iron-Catalyzed Aerobic Dehydrogenative Kinetic Resolution of Cyclic Secondary Amines
作者:Ran Lu、Liya Cao、Honghao Guan、Lei Liu
DOI:10.1021/jacs.9b00615
日期:2019.4.17
dehydrogenative kinetic resolution of cyclic secondaryamines using air as an oxidant has been reported. The economical and practical method is applicable to a series of cyclic benzylic amines, including 5,6-dihydrophenanthridines and 1,2-dihydroquinolines, with diverse functional groups at the α position in high yields with excellent enantioselectivities. The direct dehydrogenative kinetic resolution of
An efficient, one-pot, domino synthesis of quinolines via the coupling of iodoanilines with allylicalcohols facilitated by palladium catalysis is described. The overall synthetic process involves an intermolecular Heck coupling between 2-iodoanilines and allylicalcohols, intramolecular condensation of in situ generated ketones with an internal amine functional group, and a dehydrogenation sequence