A novel direct synthesis of 3-acyl-4-aryldihydroquinolin-2(1H)-ones via metal-free radical tandem cyclization between N-arylcinnamamides and aldehydes
作者:Wen-Peng Mai、Ji-Tao Wang、Yong-Mei Xiao、Pu Mao、Kui Lu
DOI:10.1016/j.tet.2015.08.054
日期:2015.10
method for the synthesis of disubstituted dihydroquinolin-2(1H)-ones via intermolecular radical tandem addition/cyclization was developed. This method provides a novel and straightforward route to 3-acyl-4-aryldihydroquinolin-2(1H)-ones in one step by C–H functionalization. A possible mechanism for the formation of 3,4-dihydroquinolin-2(1H)-ones is also proposed.
对于二取代的二氢喹啉-2(1合成中的高效,实用的不含金属的方法ħ经由分子间自由基串联加法/环化) -酮被开发。此方法提供了一种新颖和简单的路线3-酰基-4- aryldihydroquinolin-2(1 ħ在一个步骤中由C-H官能化) -酮。为形成一种可能的机制3,4-二氢喹啉-2(1 H ^) -酮还提出。
Visible-Light-Induced Radical Tandem Aryldifluoroacetylation of Cinnamamides: Access to Difluoroacetylated Quinolone-2-ones And 1-Azaspiro[4.5]decanes
zation processes. The latter process occurs when there is a p-RO substituent on the aniline. This protocol affords straightforward new routes to separately synthesize quinoline-2-ones and spiro[4.5]decanes in moderate to good yields.
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。
Silver-Catalyzed Radical Tandem Cyclization: An Approach to Direct Synthesis of 3-Acyl-4-arylquinolin-2(1<i>H</i>)-ones
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