Catalytic Generation of Zinc Carbenes from Alkynes: Zinc-Catalyzed Cyclopropanation and SiH Bond Insertion Reactions
作者:Rubén Vicente、Jesús González、Lorena Riesgo、Javier González、Luis A. López
DOI:10.1002/anie.201203914
日期:2012.8.6
Think zinc: Synthetically relevant zinc(II) carbenes are catalytically generated fromalkynes (see scheme). This new approach allows zinc‐catalyzed cyclopropanation and SiHbondinsertionreactions to generate the corresponding cyclopropylfurans or silane derivatives. The structure of the key carbene intermediate was studied using theoretical methods.
Cu(I)-Catalyzed Regioselective Synthesis of Polysubstituted Furans from Propargylic Esters via Postulated (2-Furyl)carbene Complexes
作者:José Barluenga、Lorena Riesgo、Rubén Vicente、Luis A. López、Miguel Tomás
DOI:10.1021/ja8058342
日期:2008.10.15
Polysubstituted furan derivatives are regioselective obtained from (bis-alkynyl)methyl carboxylates in the presence of catalytic amounts of copper(I) salts. This multistep process is consistent with the intermediacy of a copper(I) (2-furyl)carbene complex which is intercepted by suitable trapping reagents.