A Facile Zr-Mediated Approach to (Z)-Enynols and Its Application to Regio- and Stereoselective Synthesis of Fully Substituted Dihydrofurans
摘要:
[GRAPHICS]Efficient synthetic approaches to stereodefined (Z)-enynols have been developed through zirconium-mediated cross-coupling reactions of three different components involving alkyne, ketone, and alkynyl bromide in a one-pot procedure. The subsequent electrophilic cyclization of a wide variety of (Z)-enynols affords fully substituted (Z)-5-(1-iodoylidene)2,5-dihydrofurans with high regio- and stereoselectivity under mild reaction conditions.
A Facile Zr-Mediated Approach to (Z)-Enynols and Its Application to Regio- and Stereoselective Synthesis of Fully Substituted Dihydrofurans
摘要:
[GRAPHICS]Efficient synthetic approaches to stereodefined (Z)-enynols have been developed through zirconium-mediated cross-coupling reactions of three different components involving alkyne, ketone, and alkynyl bromide in a one-pot procedure. The subsequent electrophilic cyclization of a wide variety of (Z)-enynols affords fully substituted (Z)-5-(1-iodoylidene)2,5-dihydrofurans with high regio- and stereoselectivity under mild reaction conditions.
Cleavage of a Carbon−Carbon Triple Bond via Gold-Catalyzed Cascade Cyclization/Oxidative Cleavage Reactions of (<i>Z</i>)-Enynols with Molecular Oxygen
作者:Yuanhong Liu、Feijie Song、Shenghai Guo
DOI:10.1021/ja062610q
日期:2006.9.1
A highly efficient carbon-carbon triple bondcleavage reaction of (Z)-enynols was developed, which offered a new route to highly substituted butenolides. The methodology is realized by a tandem reaction using a single gold(I) catalyst, which could catalyze different reactions of cyclization/oxidativecleavage in the same vessel.
A Facile Zr-Mediated Approach to (<i>Z</i>)-Enynols and Its Application to Regio- and Stereoselective Synthesis of Fully Substituted Dihydrofurans
作者:Yuanhong Liu、Feijie Song、Liqing Cong
DOI:10.1021/jo050966z
日期:2005.8.1
[GRAPHICS]Efficient synthetic approaches to stereodefined (Z)-enynols have been developed through zirconium-mediated cross-coupling reactions of three different components involving alkyne, ketone, and alkynyl bromide in a one-pot procedure. The subsequent electrophilic cyclization of a wide variety of (Z)-enynols affords fully substituted (Z)-5-(1-iodoylidene)2,5-dihydrofurans with high regio- and stereoselectivity under mild reaction conditions.