[GRAPHICS]Three isomers of bis(7-azaindolyl)methane have been synthesized and fully characterized. Isomers 1 and 2 contain 7-azaindolyl groups that are bound to the CH2 group through nitrogen atoms. However, 1 contains two "normal" 7-azaindolyl groups, whereas 2 contains both a normal 7-azaindolyl group and a tautomer form of 7-azaindolyl. The third isomer 4 contains two 7-azaindolyl groups that are bound to the CH2 group through the carbon atom at the position-3. These three isomers show distinct absorption and emission spectra, attributable to the different forms of 7-azaindolyl groups in the isomers, as indicated by the results of ab initio calculations.
Dinuclear Copper(I) Complexes as Precatalysts in Ullmann and Goldberg Coupling Reactions
作者:Estela Haldón、Eleuterio Álvarez、M. Carmen Nicasio、Pedro J. Pérez
DOI:10.1021/om900119r
日期:2009.7.13
The use of structurally well-characterized copper(I) species as precatalysts in C−N and C−S bond forming reactions is described. Two new dinuclear Cu(I) complexes containing two isomeric ligands of bis(7-azaindolyl)methane have been synthesized and fully characterized by NMR and X-ray diffraction studies. Both copper(I) species exhibit a 1:1 Cu/L ratio and have been used as precatalysts in the N-arylation