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
A silver-catalyzed efficient and practical synthesis of 3-acyl-4-arylquinolin-2(1H)-ones or 3-acyl-4-aryldihydroquinolin-2(1H)-ones through intermolecular radical addition/cyclization in aqueous solution is reported. This method provides a novel, highly efficient, and straightforward route to substituted quinolin-2-ones or 3,4-dihydroquinolin-2-ones in one step. A possible mechanism for the formation
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.
A mild visible-light-induced Pd-catalyzed intermolecular radical cascade reaction of N-arylacrylamides with unactivated alkyl bromides is disclosed. Photoexcited Pd complexes transfer a single electron in this protocol, and hybrid alkyl Pd-radical species are involved as the key reaction intermediates. Sophisticated bioactive oxindole derivatives bearing various substituents and substitution patterns
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.