A general synthesis of vinylic silyl hydrides using nickel catalysis. Applications to the syntheses of silylene-tethered conjugated polymers
摘要:
Treatment of benzylic or allylic dithioacetals with Me-2((PrO)-Pr-i)SiCH2MgCl in the presence of NiCl2(PPh3)(2) catalyst yielded the corresponding i-propoxy(vinyl)silanes which are reduced with LIAlH4, to afford vinylic silyl hydrides. These hydrides serve as the precursors for the syntheses of silylene-tethered sigma,pi-conjugated copolymers. (C) 1998 Elsevier Science Ltd. All rights reserved.
The stereoselective route toward new molecular and macromolecular compounds containing arylene-germylene-vinylene units is described. The reagents for germylative coupling reaction were 1,4-bis(dimethylvinylgermyl)benzene (1) and vinyl-and divinylarenes with ruthenium complexes (2a, 2b) as catalysts. NMR characterization of all isolated products, results of MS and elemental analysis for molecular compounds (3-5), and GPC for oligomers (6-8) are presented. Absorption and luminescence properties of the synthesized compounds are discussed and compared with those of model chromophores.
Synthesis and Photophysical Studies of Silylene-Spaced Divinylarene Copolymers. Molecular Weight Dependent Fluorescence of Alternating Silylene−Divinylbenzene Copolymers
Norbornadiene as an Efficient Hydrogen Scavenger for the Palladium-Catalyzed Conversion of Hydrosilanes to Alkoxysilanes
作者:Sundarraj Sudhakar、Tien-Yau Luh
DOI:10.1021/jo025886z
日期:2002.9.1
A palladium-catalyzed mild and efficient method for the alcoholysis of hydrosilanes containing a C=C bond in the presence of norbornadiene (NBD) is reported. The highly strained NBD acts as a hydrogen scavenger, which abstracts the hydrogen produced during the process, protecting the C=C bond from being hydrogenated.
A general synthesis of vinylic silyl hydrides using nickel catalysis. Applications to the syntheses of silylene-tethered conjugated polymers
作者:Ruey-Min Chen、Tien-Yau Luh
DOI:10.1016/s0040-4020(97)10218-6
日期:1998.2
Treatment of benzylic or allylic dithioacetals with Me-2((PrO)-Pr-i)SiCH2MgCl in the presence of NiCl2(PPh3)(2) catalyst yielded the corresponding i-propoxy(vinyl)silanes which are reduced with LIAlH4, to afford vinylic silyl hydrides. These hydrides serve as the precursors for the syntheses of silylene-tethered sigma,pi-conjugated copolymers. (C) 1998 Elsevier Science Ltd. All rights reserved.
Synthesis and Efficient Energy Transfer in a Three-Chromophore Energy Gradient of Regioregular Silylene-Spaced Divinylarene Copolymers
作者:Yen-Ju Cheng、Tien-Yau Luh
DOI:10.1021/ma050140z
日期:2005.5.1
Regioregular silylene-spacedcopolymers 1 composed of an energy gradient with three different chromophores have been achieved by rhodium-catalyzed hydrosilylation of bis-vinylsilanes 3 and bis-alkynes 4. Monomeric reference compounds 2 were prepared for comparison. The ratio of three chromophores is 1:2:1, corresponding to D1, D2, and A chromophores, respectively. The dimethylsilylene (SiMe2) moiety