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
FeCl<sub>2</sub>-Catalyzed Decarboxylative Radical Alkylation/Cyclization of Cinnamamides: Access to Dihydroquinolinone and Pyrrolo[1,2-<i>a</i>]indole Analogues
作者:Zhihao Cui、Da-Ming Du
DOI:10.1021/acs.joc.8b00511
日期:2018.5.4
91%) with excellent diastereoselectivity (>20:1 dr) was developed. The inexpensive FeCl2·4H2O works as catalyst, and easily prepared peresters (or peroxides) from aliphatic acids act as alkylating reagents and single electron oxidants. This environmentally friendly reaction proceeds via an FeCl2-catalyzed alkyl radical cascade addition/cyclization fashion.
开发了一种简单且统一的方法,以中等至高收率(高达91%)合成具有非对映选择性(> 20:1 dr)的烷基化二氢喹啉酮和吡咯并[1,2- a ]吲哚衍生物。廉价的FeCl 2 ·4H 2 O用作催化剂,由脂肪酸容易制得的过酸酯(或过氧化物)用作烷基化试剂和单电子氧化剂。该环境友好的反应通过FeCl 2催化的烷基自由基级联加成/环化方式进行。
Synthesis of hydroxyl-containing oxindoles and 3,4-dihydroquinolin-2-ones through oxone-mediated cascade arylhydroxylation of activated alkenes
Hydroxyl-containing compounds are highly value-added organic molecules, and the establishment of novel methodologies for their elaboration is a long-standing challenge in organic synthesis. Here the first oxone-mediated direct arylhydroxylation of activated alkenes was developed for the synthesis of valuable hydroxyl-containing oxindoles and 3,4-dihydroquinolin-2-ones. The products were controlled
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.