A New Iodonium Ylide-Based Three-Component Reaction Leading to 2-Spirosubstituted Dihydrofurans under Microwave Irradiation
作者:Xing-Chao Tu、Yan Yu、Man-Su Tu、Bo Jiang、Chao Li、Shu-Jiang Tu
DOI:10.1002/jhet.1732
日期:2014.3
A new iodonium ylide‐based three‐component reaction for the synthesis of highly functionalized 2‐spirosubstituted dihydrofurans starting from readily available common reactants has been developed undermicrowaveirradiation. The procedure is facile, avoiding time‐consuming and costly syntheses, tedious work‐up and purifications of precursors as well as protection/deprotection of functional groups.
A pseudo multi-component electrochemical synthesis of spiro dihydrofuran derivatives
作者:Changsheng Yao、Ying Wang、Tuanjie Li、Chenxia Yu、Liang Li、Chao Wang
DOI:10.1016/j.tet.2013.10.056
日期:2013.12
An electrochemical strategy to the assembly of tricyclic spiro dihydrofuran scaffold via the reaction of aryl aldehyde and dimedone has been developed successfully. This protocol has the advantages of high yields, wide application scope and an environmental benign procedure compared with the reported methods.
Abstract Iodine–ammonium acetate–mediated annealation of dimedone with aldehydes led to facile formation of spirodihydrofuran in good yields through tandem Knoevenagel–Michael iodonation and cyclodehydroiodonation reactions in a single pot.
The use of supported Cu complex on mesoporous as a novel, efficient, heterogeneous, reusable and green catalyst for the synthesis of spiro‐dihydrofuran derivatives is reported. This methodology is effective for the reaction of dimedone with a wide range of aldehyde in the presence of BrCN and triethylamine. The structure of catalyst was characterized by different techniques such as EDX, SEM, TGA, ICP‐OES
Reaction of 5,5-dimethylcyclohexane-1,3-dione (dimedone), aldehydes and cyanogen bromide in the presence of triethylamine leads to the selective formation of spiro dihydrofurans in moderate to good yields at room temperature.