在此,我们报道了使用石墨氮化碳(gC 3 N 4)作为光催化剂,吲哚与重氮化合物的非均相光催化C-H烷基化反应。该反应操作简单,条件温和。此外,发现该催化剂在五个反应循环后稳定且可重复使用。光化学反应通过碳自由基的中介进行,碳自由基是通过可见光促进的质子耦合电子转移(PCET)过程从重氮化合物产生的。
Catalytic Functionalization of Indoles by Copper-Mediated Carbene Transfer
作者:Manuela Delgado-Rebollo、Auxiliadora Prieto、Pedro J. Pérez
DOI:10.1002/cctc.201400097
日期:2014.7
derivatives at C3 by carbene transfer from different diazoesters in a high‐yield transformation involving low catalyst loadings and short reaction times. This system has shown that the previously proposed dichotomy of carbene addition (to the doublebond) vs carbene insertion (to the CH bond) corresponds to two consecutive reaction steps: the cyclopropane intermediates, observed in the reaction mixtures
Visible‐Light‐Mediated Charge Transfer Enables C−C Bond Formation with Traceless Acceptor Groups
作者:Michael J. James、Felix Strieth‐Kalthoff、Frederik Sandfort、Felix J. R. Klauck、Felicitas Wagener、Frank Glorius
DOI:10.1002/chem.201901397
日期:2019.6.21
enabled by the photoexcitation of electron donor–acceptor (EDA) complexes with visiblelight. The traceless acceptors, which were readily prepared from amino acid and peptide feedstocks, could be used to alkylate a wide range of heteroarene and enamine donors under metal‐ and peroxide‐free conditions. The crucial role of the EDAcomplexes in the mechanism of these reactions was explored through combined