Aerobic synthesis of <i>N</i>-sulfonylamidines mediated by N-heterocyclic carbene copper(I) catalysts
作者:Faïma Lazreg、Marie Vasseur、Alexandra M Z Slawin、Catherine S J Cazin
DOI:10.3762/bjoc.16.43
日期:——
A new catalytic strategy for the one-pot synthesis of N-sulfonylamidines is described. The cationic copper(I) complexes were found to be highly active and efficient under mild conditions in air and in the absence of solvent. A copper acetylide is proposed as key intermediate in this transformation.
Sulfonyl amidines (1) and phosphoryl amidines (2), which were efficiently synthesized via a Cu-catalyzed one pot reaction, showed potent anti-bone resorptive activity in vitro. Structure activity relationship studies led to the identification of numerous osteoclast differentiation inhibitors. (C) 2009 Elsevier Ltd. All rights reserved.
Cu-Catalyzed Aerobic Oxidative Three-Component Coupling Route to <i>N</i>-Sulfonyl Amidines via an Ynamine Intermediate
作者:Jinho Kim、Shannon S. Stahl
DOI:10.1021/jo5029198
日期:2015.2.20
Cu-catalyzed aerobic oxidative three-component coupling of a terminal alkyne, secondary amine, and sulfonamide enables efficient synthesis of amidines. The use of Cu(OTf)(2) (5 mol %) produces amidines selectively without GlaserHay alkyne homocoupling products. Preliminary studies suggest that the reaction pathway involves initial oxidative coupling of the terminal alkyne with the secondary amine, followed by hydroamidation of the ynamine intermediate with the sulfonamide.