21676-90-4Relevant articles and documents
Ag(I)-Catalyzed C-H Carboxylation of Thiophene Derivatives
Lee, Mijung,Hwang, Young Kyu,Kwak, Jaesung
supporting information, p. 3136 - 3144 (2021/09/30)
CO2utilization is an attractive aspect as it allows the direct conversion of CO2into valuable chemicals. In this regard, direct incorporation of CO2into the C-H bond of heteroaromatic compounds is important due to the ubiquitous structural motifs of the heteroaromatic carboxylic acids. Herein, we report the Ag-catalyzed C-H carboxylation of thiophene derivatives. This new catalytic system involving a phosphine ligand and lithiumtert-butoxide enables the direct carboxylation of thiophenes under mild reaction conditions. Experimental studies revealed that the use oftert-butyl alkoxide is critical for the exergonic formation of an arylsilver intermediate, and the results were further supported by density functional theory calculations.
In-Depth Assessment of the Palladium-Catalyzed Fluorination of Five-Membered Heteroaryl Bromides
Milner, Phillip J.,Yang, Yang,Buchwald, Stephen L.
supporting information, p. 4775 - 4780 (2015/10/28)
A thorough investigation of the challenging Pd-catalyzed fluorination of five-membered heteroaryl bromides is presented. Crystallographic studies and density functional theory (DFT) calculations suggest that the challenging step of this transformation is
3-alkyl or aryl thiophenes from malonaldehyde derivatives
Kirsch,Prim
, p. 1721 - 1726 (2007/10/02)
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