Pon de relay: A convenient and efficient synthesis of alkene‐functionalized furansfromcyclopropenes, which proceeds through an isomerization/olefination cascade sequence under copper–palladium relaycatalysis, has been developed (see scheme).
Pon de relay:已经开发了一种方便有效的方法,从环丙烯中合成烯烃官能化的呋喃,该过程在铜-钯中继催化下通过异构化/烯化级联序列进行(参见方案)。
Dinuclear gold-catalyzed C-H bond functionalization of cyclopropenes
We report an unprecedented C-H bond functionalization of cyclopropenes enabled by dinuclear gold catalysis. Highly selective C-H allylation, alkynylation and halogenation of cyclopropenes with organic halides have been realized. The reaction does not require strong external oxidants and affords access to functionalized cyclopropenes in moderate to good yields. The reductive elimination process to controllably
我们报告了由双核金催化实现的环丙烯的前所未有的 CH 键功能化。已经实现了环丙烯与有机卤化物的高选择性 CH 烯丙基化、炔基化和卤化。该反应不需要强外部氧化剂,并且可以以中等至良好的产率获得官能化的环丙烯。可以通过使用不同的双核金催化剂来调整可控地构建 CC 或 CX 键的还原消除过程。
Azide Radical Initiated Ring Opening of Cyclopropenes Leading to Alkenyl Nitriles and Polycyclic Aromatic Compounds
作者:Bastian Muriel、Jerome Waser
DOI:10.1002/anie.202013516
日期:2021.2.19
cyclopropenes, this methodology could be extended to a one‐pot synthesis of highly functionalized polycyclicaromaticcompounds (PACs). This transformation allows the synthesis of nitrile‐substituted alkenes and aromaticcompounds from rapidly accessed cyclopropenes using only commercially available reagents.
An efficient synthesis of bifurans via dimerization of cyclopropenes has been successfully developed using a copper-promoted cycloisomerization and palladium-catalyzed dimerization cascade. These novel bifuran structures possess interesting optoelectronic properties.