favorable. The reaction instead proceeds through Ag2CO3 assisted deprotonation and subsequently reductive elimination to afford the products with diazo functionality remained. This C-H functionalization transformation can be further combined with the recently evolved palladium-catalyzed cross-couplingreaction of diazo compounds with aryliodides to develop a tandem coupling process for the synthesis of α,α-diaryl
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
Selective C−H Bond Functionalization of Unprotected Indoles by Donor‐Acceptor Carbene Insertion
作者:Juan Diego Pizarro、Lucía Morán‐González、Iván González‐Fernández、Feliu Maseras、Manuel R. Fructos、Pedro J. Pérez
DOI:10.1002/adsc.202300252
日期:2024.2.20
been carried out employing N-protected indoles, therefore eliminating the drawback of the N−H functionalization, which is by far the most reactive site. Systems selective for C−H bond functionalization by carbene insertion tolerant with the N−H functionality are scarce: Koenigs9 has described the incorporation of carbene units to C−H bonds of unprotected indoles and carbazoles, whereas Fasan and Arnold
Cyclic Sulfoxonium Ylides: Synthesis and Chemospecific Reactivity in the Catalytic Alkylation of Indoles
作者:Clarice A. D. Caiuby、Lucas Vidal、Antonio C. B. Burtoloso、Christophe Aïssa
DOI:10.1002/cctc.202201643
日期:——
Cyclic sulfoxonium ylides were prepared by palladium-catalyzed intramolecular arylation. The tether of the cyclic ylides dictates their reactivity in acid-catalysed and iridium catalyzed C3-alkylation of indoles in a chemospecific manner.
Gold-catalyzed oxidative couplings of two indoles with one aryldiazo cyanide under oxidant-free conditions
作者:RahulKumar Rajmani Singh、Rai-Shung Liu
DOI:10.1039/c7cc01304c
日期:——
Gold-catalyzedoxidative couplings of two indoles and one -cyano gold carbene to form useful bis(indolyl)methane derivatives are described; the reactions release molecular hydrogen that is detectable with GC. This gold...