Unsymmetric Electronic Push−Pull Bipyrroles − Synthesis, Spectroelectrochemical, and Photophysical Investigation
作者:Tshitundu Tshibaka、Ivan Ulliel Roche、Stéphane Dufresne、William D. Lubell、W. G. Skene
DOI:10.1021/jo901965t
日期:2009.12.18
The electrochromic and photophysical behaviors of unsymmetric bipyrroles were observed its intense color changes of the oxidized products relative to the neutral form. The color of the oxidized form and the oxidation potential were both tunable contingent on electronic group and substitution.
Conjugated 4-Methoxybipyrrole Thiophene Azomethines: Synthesis, Opto-Electronic Properties, and Crystallographic Characterization
作者:Tshitundu Tshibaka、Sophie Bishop、Ivan Ulliel Roche、Stéphane Dufresne、William D. Lubell、William G. Skene
DOI:10.1002/chem.201101397
日期:2011.9.19
the heterocycles adopting an anti‐parallel arrangement. These configurations result in extended conjugation and enhanced opto‐electronicproperties of the azomethines. Oxidation potential (Epa) was tailored by modification of the substitution pattern of the terminal thiophenes and central pyrroles of the azomethines. The combined low Epa and extended azomethine degree of conjugation resulted in stark
Prodigiosin synthesis with electron rich 2,2′-bipyrroles
作者:Benoit Jolicoeur、William D Lubell
DOI:10.1139/v07-150
日期:2008.3.1
prodigiosin synthesis has been developed that employs electron rich 2,2′-bipyrroles. In particular, undecylprodigiosin and PNU-156804 were synthesized by condensations of 4-methoxy and 4-benzyloxy 2,2′-bipyrroles, 20a and 20b, respectively, with 5-undecylpyrrole-2-carboxaldehyde in 75% and 83% yields. The 4-alkoxy-2,2′-bipyrroles were synthesized from 4-alkoxypyrrolyl butenyl ketones (15a and 15b)