Effective and Sustainable Access to Quinolines and Acridines: A Heterogeneous Imidazolium Salt Mediates C-C and C-N Bond Formation
作者:Patricia Gisbert、María Albert-Soriano、Isidro M. Pastor
DOI:10.1002/ejoc.201900880
日期:2019.8.15
A robust catalytic system mediates metal‐free and solvent‐free C–C and C–N bond formation by favoring the interaction between the reactants due to the presence of carboxylicacid moieties and chloride counterion, providing a sustainable protocol with appropriate environmental impact.
Highly Diastereo- and Enantioselective Ir-Catalyzed Hydrogenation of 2,3-Disubstituted Quinolines with Structurally Fine-Tuned Phosphine–Phosphoramidite Ligands
作者:Xin-Hu Hu、Xiang-Ping Hu
DOI:10.1021/acs.orglett.9b03925
日期:2019.12.20
diastereo- and enantioselectiveIr-catalyzedhydrogenation of unfunctionalized 2,3-disubstituted quinolines, especially 3-alkyl-2-arylquinolines, has been realized. The success of this hydrogenation is ascribed to the use of a structurally fine-tuned chiral phosphine-phosphoramidite ligand with a (Sa)-3,3'-dimethyl H8-naphthyl moiety and (Rc)-1-phenylethylamine backbone. The hydrogenation displayed broad
Phosphine free Mn-complex catalysed dehydrogenative C–C and C–heteroatom bond formation: a sustainable approach to synthesize quinoxaline, pyrazine, benzothiazole and quinoline derivatives
作者:Kalicharan Das、Avijit Mondal、Dipankar Srimani
DOI:10.1039/c8cc05877f
日期:——
Herein the first sustainable synthesis of quinoxalines, pyrazines and benzothiazoles catalysed by a phosphine free Mn(I) complex via acceptorless dehydrogenative coupling (ADC) is reported. This method is also applied successfully to synthesize quinolines via the dehydrogenation (removal of H2) and condensation (removal of H2O) reaction between 2-aminobenzyl alcohols and secondary alcohols.
(Bromodimethyl)sulfonium Bromide Catalyzed Solvent-Free Friedlander Synthesis of Substituted Quinolines
作者:R. Venkatesham、A. Manjula、B. Vittal Rao
DOI:10.1002/jhet.873
日期:2012.7
A simple and efficient (bromodimethyl)sulfoniumbromidecatalyzedsynthesis of quinolines, by condensation of α‐amino carbonyl, that is, 2‐aminobenzophenone and 2‐aminoacetophenone with α‐methylene containing carbonyl like 1,3‐dicarbonyls has been developed. The reaction is versatile, solvent‐free protocol for generation of structurally diverse quinolines.
and pyrimidines using combinations of 2-aminobenzyl alcohols and alcohols as well as benzamidine and two different alcohols, respectively. These reactions proceed with high atom efficiency via a sequence of dehydrogenation and condensation steps that give rise to selective C-C and C-N bond formations, thereby releasing 2 equiv of hydrogen and water. A hydride Mn(I) PNPpincercomplex recently developed