Silver-Promoted Radical Cascade Aryldifluoromethylation/Cyclization of 2-Allyloxybenzaldehydes for the Synthesis of 3-Aryldifluoromethyl-Containing Chroman-4-one Derivatives
Organophotoredox‐Catalyzed Cascade Radical Annulation of 2‐(Allyloxy)arylaldehydes with
<i>N</i>
‐(acyloxy)phthalimides: Towards Alkylated Chroman‐4‐one Derivatives
作者:Sanju Das、Sushanta Kumar Parida、Tanumoy Mandal、Laxmikanta Sing、Suman De Sarkar、Sandip Murarka
DOI:10.1002/asia.201901735
日期:2020.3.2
approach for the synthesis of highly important 3-alkyl substituted chroman-4-one scaffold is developed using visible light induced radicalcascade cyclization strategy. The reaction is initiated through the generation of alkyl radicals from N-(acyloxy)phthalimides under photoredox conditions, which subsequently undergo intermolecular cascaderadical cyclization on 2-(allyloxy)arylaldehydes to afford chroman-4-one
Copper-catalyzed synthesis of CN-containing chroman-4-ones via intramolecular radical cascade acyl-cyanation reaction
作者:Liang Wang、Min Jiang、Ming-qi Shi
DOI:10.1016/j.tetlet.2021.153061
日期:2021.5
A copper-catalyzed intramolecular radical cascade acyl-cyanation to synthesize cyano-containing chroman-4-ones has been developed. A series of CN-substituted chroman-4-one derivatives can be prepared with moderate to good yields using green cyano source under mild conditions. Control experiments indicated this reaction involved an intramolecular acyl radical addition/cyanation process. Moreover, this
Synthesis of sulfone-functionalized chroman-4-ones and chromans through visible-light-induced cascade radical cyclization under transition-metal-free conditions
作者:Yousheng Mei、Lulu Zhao、Qi Liu、Shuchen Ruan、Lei Wang、Pinhua Li
DOI:10.1039/d0gc00009d
日期:——
A highlyefficient and straightforward approach has been developed for selective intramolecular radical cyclization of arylsulfinic acids with o-(allyloxy)arylaldehydes, o-(homoallyloxy)arylaldehydes and (but-3-en-1-yloxy)benzenes. This photoinduced reaction generated sulfone-functionalized chroman-4-ones and chromans in good to excellent yields under simple and mild conditions without an external
There are provided spiroindolinone derivatives of the formula
and pharmaceutically acceptable salts and esters thereof
wherein R
1
, R
2
, R
3
, R
4
and R are as herein described.
The compounds exhibit anticancer activity.
There are provided spiroindolinone derivatives of the formula
and pharmaceutically acceptable salts and esters thereof wherein R1, R2, R3, R4 and R are as herein described. The compounds exhibit anticancer activity.