<scp>Copper‐Catalyzed</scp>
1,2,
<scp>5‐Trifunctionalization</scp>
of Terminal Alkynes Using
<scp>SR</scp>
as a Transient Directing Group for Radical Translocation
作者:Jian Feng、Fang Zhang、Chenyun Shu、Gangguo Zhu
DOI:10.1002/cjoc.202200092
日期:2022.7.15
The first Cu-catalyzed 1,2,5-trifunctionalization of abundant terminalalkynes is realized by merging hydrogen atom transfer and traceless directing strategy with SR as a transientgroup, delivering highly functionalized aldehydes in moderate to excellent yields with broad substrate scope. The synthetic utility of this method was demonstrated by the gram-scale reaction and downstream transformations
通过将氢原子转移和无痕导向策略与 SR 作为瞬态基团相结合,实现了第一次 Cu 催化的丰富末端炔烃的 1,2,5-三官能化,以中等至优异的产率提供高度官能化的醛,具有广泛的底物范围。该方法的合成效用通过克级反应和所得产物的下游转化得到证明。鉴于在单个反应中高效安装三种不同的官能团,它可以作为一种非常有吸引力的方法,用于从容易获得的起始材料快速组装复杂分子。
Intramolecular Dearomatizing [3 + 2] Annulation of α-Imino Carbenoids with Aryl Rings Furnishing 3,4-Fused Indole Skeletons
作者:Tomoya Miura、Yuuta Funakoshi、Masahiro Murakami
DOI:10.1021/ja412663a
日期:2014.2.12
The rhodium-catalyzed dearomatizing [3 + 2] annulation reaction of 4-(3-arylpropyl)-1,2,3-triazoles is described. It provides a straightforward synthetic pathway from simple 5-aryl-1-alkynes leading to tricyclic 3,4-fused dihydroindoles via the corresponding 1,2,3-triazoles.