Fe-Catalyzed decarbonylative cascade reaction of <i>N</i>-aryl cinnamamides with aliphatic aldehydes to construct 3,4-dihydroquinolin-2(1<i>H</i>)-ones
A practical Fe-catalyzed decarbonylative cascade reaction of N-aryl cinnamamides with aliphaticaldehydes to provide C3 alkylated 3,4-dihydroquinolin-2(1H)-ones is developed. Aliphaticaldehydes were oxidatively decarbonylated into 1°, 2° and 3° alkyl radicals conveniently, allowing for the subsequent cascade construction of C(sp3)-C(sp3) and C(sp3)-C(sp2) bonds via radical addition and HAS-type cyclization
Molecular Oxygen-Promoted General and Site-Specific Alkylation with Organoboronic Acid
作者:Anbo Ling、Lizhi Zhang、Ren Xiang Tan、Zhong-Quan Liu
DOI:10.1021/acs.joc.8b02277
日期:2018.12.7
alkylating method using organoboronic acid under 1 atm of oxygen is developed. It allows a facile access to a widerange of functionalized molecules with privileged scaffolds in drugs and natural products such as oxindoles, quinolinones, chromones, naphthoquinones, coumarins, and quinolones. In contrast to previous alkylation approaches that generally requiring transition-metal catalysis and a stoichiometric
Silver-catalyzed tandem radical acylarylation of cinnamamides in aqueous media
作者:Hua Yang、Li-Na Guo、Xin-Hua Duan
DOI:10.1039/c4ra08529a
日期:——
A mild silver-catalyzed regioselective radical addition/cyclization reaction of cinnamamides with α-oxocarboxylicacids has been developed. The procedure proceeded well under very mild conditions, leading to a diverse range of 3-acyl-4-aryldihydroquinolin-2(1H)-ones in moderate to good yields.
Rh(<scp>i</scp>)-Catalyzed regioselective arylcarboxylation of acrylamides with arylboronic acids and CO<sub>2</sub>
作者:Lei Cai、Lei Fu、Chunlin Zhou、Yuzhen Gao、Shangda Li、Gang Li
DOI:10.1039/d0gc02667k
日期:——
The first Rh(I)-catalyzed regioselective arylcarboxylation of electron-deficient acrylamides with arylboronic acids under atmospheric pressure of CO2 has been developed. A range of acrylamides and arylboronic acids were compatible with this reaction under redox-neutral conditions, leading to a series of malonate derivatives that are versatile building blocks in organic syntheses.
An efficient, silver-induced tandem radical addition/cyclization for the synthesis of 3,4-dihydroquinolinones is presented, which exhibits a good functional group tolerance. The reaction is easy to operate and amenable to a multigram-scale synthesis. Additionally, this work illustrates the formation of a key skeleton for the synthesis of biologically interesting 3,4-dihydroquinolinone alkaloids.