A convenient Ni(II)‐catalyzed C−C and C−N cascade couplingreaction was developed to directly access various 2,4‐disubstituted imidazoles. The reaction scope covers a variety of aryl and aliphatic substitutions, which demonstrate moderate‐to‐excellent yields. The tolerance of halogen and N‐containing heterocyclic groups demonstrates the versatility of this method for further synthetic explorations
Paired Electrolysis for Decarboxylative Cyanation: 4-CN-Pyridine, a Versatile Nitrile Source
作者:Gadde Sathish Kumar、Prashant S. Shinde、Haifeng Chen、Krishnamoorthy Muralirajan、Rajesh Kancherla、Magnus Rueping
DOI:10.1021/acs.orglett.2c01897
日期:2022.9.9
decarboxylative cyanation of amino acids under paired electrochemical reaction conditions has been developed. 4-CN-pyridine was found to be a new and effective cyanation reagent undercatalyst-freeconditions. Mechanistic studies support a nucleophilic reaction pathway, and the cyanation protocol can be applied to diverse substrates including N,N-dialkyl aniline and indole derivatives.
Freudenberg; Eichel; Leutert, Chemische Berichte, 1932, vol. 65, p. 1183,1190
作者:Freudenberg、Eichel、Leutert
DOI:——
日期:——
Synthesis of Imidazoles and Oxazoles via a Palladium-Catalyzed Decarboxylative Addition/Cyclization Reaction Sequence of Aromatic Carboxylic Acids with Functionalized Aliphatic Nitriles
efficient approach for the assembly of multiply substituted imidazoles and oxazoles in a single-step manner. These transformations are based on a decarboxylation addition and annulation of readily accessible aromatic carboxylic acids and aliphatic nitriles and exhibit good functional group compatibility and a high step economy. The reaction is scalable, and as-prepared products could be transformed into practical