1,4-Bis[2-2-(l-methyl-1H-imidazol-5-yl)ethynyl}-3-thienyl]benzene, l,4-bis[2-(2-ferrocenylethynyl)-3-thienyl]benzene, and somerelatedcompounds were prepared and their UV-visible spectra were studied.
Chemistry of Bis(2-ethynyl-3-thienyl)arene and Related Systems, Part 5: Preparation of an Unsymmetrical 4,4’-Bis(3-thienyl)biphenyl Derivative Containing a 2-[2-(Diphenylphosphino)ethynyl]-3-thienyl Moiety
作者:Kozo Toyota、Yasutomo Tsuji、Noboru Morita
DOI:10.1080/10426501003772037
日期:2010.5.27
An unsymmetrically substituted 4,4′-bis(3-thienyl)biphenyl derivative of 4-(2-ethynyl-3-thienyl)-4′-(3-thienyl)biphenyl type was prepared, utilizing 4-bromo-4′-(2-iodo-3-thienyl) biphenyl as synthetic intermediate. Reaction of 4-(2-ethynyl-3-thienyl)-4′-(3-thienyl) biphenyl with ethylmagnesium bromide followed by treatment with chlorodiphenylphosphine afforded 4-[2-(2-diphenylphosphinoethynyl)-3-t
Benzo-fused tri- to heptacyclic heteroarenes were effectively constructed by the rhodium-catalyzed dehydrogenative coupling of phenylheteroarenes with alkynes. Using alkenes as coupling partners, dehydrogenative alkenylation took place selectively on the phenyl moiety of phenylheteroarenes. Several experiments with deuterium-labeled substrates indicated that double C-H bond cleavages take place even in the reaction with alkenes.
Preparation of 1,4-bis(2-ethynyl-3-thienyl)benzenes as versatile spacers for connection of heterocycles
作者:K TOYOTA、Y GOTO、K OKADA、N MORITA
DOI:10.1016/s0385-5414(07)81098-7
日期:2007.10.1
Iodination of 1,4-di(3-thienyl)benzene gave 1,4-bis(2-iodo-3-thienyl)benzene, which was converted to 1,4-bis(2-ethynyl-3-thienyl)benzene. Novel 1,4-bis[2-(pyridylethynyl)-3-thienyl]benzene ligands containing the bis(ethynylthienyl)benzene spacer were prepared by Sonogashira reaction. Advantage of the spacer was demonstrated by introducing functionalized alkyl groups to the 5-position of the thiciphene ring of 1,4-bisl2-(trialkylsilylethynyl)-3-thienyl]benzene.