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。
Synthesis of bicyclo[3.1.0]hexanes by (3 + 2) annulation of cyclopropenes with aminocyclopropanes
作者:Bastian Muriel、Alec Gagnebin、Jerome Waser
DOI:10.1039/c9sc03790j
日期:——
We report the convergent synthesis of bicyclo[3.1.0]hexanes possessing an all-carbon quaternary center via a (3 + 2) annulation of cyclopropenes with cyclopropylanilines. Using an organic or an iridium photoredox catalyst and blue LED irradiation, good yields were obtained for a broad range of cyclopropene and cyclopropylaniline derivatives. The reaction was highly diastereoselective when using difluorocyclopropenes
A modular synthesis of tetrasubstitutedfuran carboxylates using a tandem cycloisomerization/oxidative carbonylation sequence of cyclopropenes has been successfully developed. The Tandem Metal RelayCatalysis (TMRC) pathway accounted for the high efficiency of this transformation.
Carbon-Centered Radical with Leaving Group-Mediated Ring Opening of Cyclopropenes <i>via</i> the Rearrangement of Cyclopropyl to the Allyl Radical: A General Access to Multisubstituted 1,3-Dienes
作者:Geng-Xin Liu、Xiao-Ting Jie、Xing-lin Li、Li-Sheng Yang、Huang Qiu、Wen-Hao Hu
DOI:10.1021/acscatal.3c00619
日期:2023.4.21
cleavage of cyclopropenesvia the rearrangement of the cyclopropyl radical to the allyl radical after the addition of a carbon-centered radical with a leaving group onto the strained double bond, leading to 1,3-diene products with the release of the leaving group. This approach represents a reaction mode for carbon-centered radical-mediated functionalization of cyclopropenes with ring cleavage. The
hydroacylation of cyclopropene is disclosed for synthesizing various 2-acylcyclopropane derivatives under mild reaction conditions. High functional group tolerance of this protocol features a novel route to access a divergent synthesis of acylated cyclopropane in a diastereoselective manner by photoinduced decarboxylation of α-ketoacid followed by acyl radical addition to cyclopropene. Additionally, the