Siloles attached to phenylene ethynylene strands were prepared successfully by Sonogashira coupling of 2,5-dibromosilole with ethyne-terminated phenylene ethynylenes. Elongation of the arylene ethynylene chain involving up to at least three aromatic rings leads to high quantum yields in solution.
A series of arylene cores substituted by phenylene ethynylenes were synthesized by Sonogashira coupling of diethynyl aromatic compounds with an iododiphenylethyne which had been prepared conveniently by making use of a one-shot double-elimination reaction. Photoluminescence properties of the arylene ethynylenes thus prepared were recorded both in solution and in the solid state.
Dihalo-Substituted Dibenzopentalenes: Their Practical Synthesis and Transformation to Dibenzopentalene Derivatives
作者:Feng Xu、Lifen Peng、Akihiro Orita、Junzo Otera
DOI:10.1021/ol3017353
日期:2012.8.3
with I2 and IBr, respectively. These dihalo-substituted pentalenes reacted with terminal ethynes in Sonogashira coupling and with arylboronic acid in Suzuki–Miyaura coupling to give a series of phenylethynyl- and/or aryl-substituted pentalenes. Suzuki–Miyaura coupling of the halopentalenes with in situ prepared pentaleneboronic esters provided bis-, tri-, and tetra(dibenzopentalene)s. It was found that
1,2-Di(halophenyl)ethenyl phenyl sulfones were prepared readily by successive treatment of halophenylmethyl sulfones with LiHMDS (lithium hexamethyldisilazide), halobenzaldehydes, diethyl chlorophosphate and LiHMDS. The di(halophenyl)ethenyl sulfones thus obtained were transformed successfully to aryleneethynylenes by Sonogashira coupling with arylethyne followed by LiHMDS-promoted elimination of phenylsulfinic acid.
Preparative Fluorous Mixture Synthesis of Diazonium-Functionalized Oligo(phenylene vinylene)s
作者:Huahua Jian、James M. Tour
DOI:10.1021/jo048051s
日期:2005.4.1
were made to bear aryl diazonium functionalities that allow them to be used as surface grafting moieties in hybrid silicon/molecule assemblies. A library of OPV and hybrid oligomer tetramers was synthesized using fluorous mixture synthesis (FMS). The fluorous tags, which are secondaryamines bearing different numbers of fluorine atoms, were synthesized and used as phase tags in mixture synthesis. The