Synthesis of new bis[p-(phenylethynyl)phenyl]hetarylenes and bis[p-(phenylglyoxalyl)phenyl]hetarylenes
作者:M. L. Keshtov、A. L. Rusanov、N. M. Belomoina、A. K. Mikitaev、G. B. Sarkisyan、M. M. Begretov
DOI:10.1007/bf01430752
日期:1996.9
A series of new bis[p-(phenylethynyi)phenyl]hetarylenes was obtained by cross-coupling between heteroaromatic dibromides and phenylacetylene catalyzed by phosphine complexes of palladium in the presence of Cul and an organic base. Bis[p-(phenylethynyl)phe-nyl]hetarylenes were oxidized to the corresponding bis[p-(phenylglyoxalyl)phenylihetarylenes using the I2-DMSO system.
Improved synthesis of bis[p-(phenylethynyl)phenyl]hetarylenes
作者:M. L. Keshtov、A. L. Rusanov、N. M. Belomoina、A. K. Mikitaev
DOI:10.1007/bf02495139
日期:1997.10
Bis[p-(phenylethynyl)phenyl]hetarylenes were synthesized in high yields by an improved method using cross-coupling between phenylacetylene and 4,4′-dibromobenzil followed by condensation of the 4,4′-di(phenylethynyl)benzil obtained with eithero-phenylenediamine and 3,4-diaminobenzoic acid or with benzaldehyde andp-nitrobenzaldehyde in the presence of ammonium acetate.