Combined Photoredox and Iron Catalysis for the Cyclotrimerization of Alkynes
作者:Michael Neumeier、Uttam Chakraborty、Dieter Schaarschmidt、Victor Pena O'Shea、Raul Perez‐Ruiz、Axel Jacobi von Wangelin
DOI:10.1002/anie.202000907
日期:2020.8.3
combinations of visible‐light photocatalysis with metal catalysis have recently enabled the development of hitherto unknown chemical reactions. Dual mechanisms from merging metal‐free photocatalysts and earth‐abundant metal catalysts are still in their infancy. We report a photo‐organo‐iron‐catalyzed cyclotrimerization of alkynes by photoredox activation of a ligand‐free Fe catalyst. The reaction operates
Exploiting Guanidine as a Ligand in Cobalt-Catalyzed Alkyne Cyclotrimerizations
作者:James Stambuli、Chad Eichman、Jason Bragdon
DOI:10.1055/s-0030-1259931
日期:2011.5
The synthesis of polysubstituted arenes is accomplished via the regioselective cyclotrimerization of alkynes utilizing a guanidine-ligated cobalt catalyst.
多取代芳烃的合成是通过炔烃的区域选择性环三聚反应来完成的,使用胍连接的钴催化剂。
H-BPin/KO<sup><i>t</i></sup>Bu Promoted Activation of Cobalt Salt to a Heterotopic Catalyst for Highly Selective Cyclotrimerization of Alkynes
作者:Shuo Song、Chuhan Li、Tianfen Liu、Panke Zhang、Xiaoming Wang