1610767-83-3Relevant academic research and scientific papers
Copper-Catalyzed Intramolecular C-H Amination: A New Entry to Substituted Xanthine Derivatives
Shimizu, Maki,Hayama, Noboru,Kimachi, Tetsutaro,Inamoto, Kiyofumi
, p. 4183 - 4190 (2017/09/12)
Catalytic synthesis of xanthines was achieved in the presence of a copper catalyst. The process involves copper-catalyzed intramolecular C-H amination of benzamidines that possess a uracil moiety and produces variously substituted xanthines generally in good to high yields. This work introduces a new, facile approach to polysubstituted xanthine compounds..
Concise Xanthine Synthesis through a Double-Amidination Reaction of a 6-Chlorouracil with Amidines using Base-Metal Catalysis
Morel, Bénédicte,Franck, Philippe,Bidange, Johan,Sergeyev, Sergey,Smith, Dan A.,Moseley, Jonathan D.,Maes, Bert U. W.
, p. 624 - 628 (2017/02/15)
A new and concise route towards xanthines through a double-amidination reaction is described; consecutive intermolecular C?Cl and intramolecular oxidative C?H amidination. N-uracil amidines are obtained through SNAE on a 6-chlorouracil with amidines. Direct Cu-catalyzed oxidative C?H amidination on these N-uracil amidines yields polysubstituted xanthines. Sustainable oxidants, tBu2O2or O2, can be used in this oxidase-type reaction. The protocol allows for the introduction of N1, N3, N7, and C8 substituents during the xanthine-scaffold construction, thus avoiding post-functionalization steps. Both 6-chlorouracils and amidines are readily available commercially or through synthesis.
Synthesis and characterization of amino-NHC coinage metal complexes and application for C-H activation of caffeine
Huang, Hsuan-Jui,Lee, Wei-Chih,Yap, Glenn P.A.,Ong, Tiow-Gan
, p. 64 - 73 (2014/05/06)
This paper describes the synthesis and characterization of silver, copper and gold complexes supported by several amino-NHC ligands with different amino side arms. The transmetallation process using silver-NHC complexes can be used to prepare amino-NHC copper and gold complexes easily in high yield. In addition, the catalytic activities of copper complexes are examined for arylation of caffeine via C-H bond activation.
