A copper-mediated cyclization reaction of hydrazine with enediynones providing pyrazolo[1,5-a]pyridines
作者:Hung-Chou Wu、Long-Chih Hwang、Ming-Jung Wu
DOI:10.1039/c0ob00756k
日期:——
2,7-Disubstituted pyrazolo[1,5-a]pyridines were synthesized in good chemical yields by the reaction of enediynones with hydrazine, followed by addition of copper chloride. This reaction can tolerate many functional groups.
通过烯二酮与二烯酮的反应合成了2,7-二取代的吡唑并[1,5- a ]吡啶,化学产率高。肼,然后添加 氯化铜。该反应可以耐受许多官能团。
Suzuki Coupling Reactions of (<i>E</i>)- and (<i>Z</i>)-Chloroenynes with Boronic Acids: Versatile Access to Functionalized 1,3-Enynes
A stereoselective, palladium-catalyzed, cross-coupling reaction between chloroenynes 4 and boronic acids was successfully developed. This procedure is general and provides desired functionalized enynes 1 in high yields. The scope and limitations of this new reaction are described.