The preparation of polymer beads by photocationic suspension co-polymerisation of 2-(arylsilyl)ethyl vinyl ethers
作者:Laurent Porres、Herv?? Deleuze、Yannick Landais
DOI:10.1039/b201520j
日期:2002.10.1
Polymer beads have been prepared by photocationic suspension polymerisation of 2-(aryldimethyl)silyl ethers in perfluorooctane in the course of our studies on polymer-supported desymmetrisation of 1-silacyclohexa-2,5-dienes. Good yields of 100–200 μm beads of satisfactory shape have been obtained using a perfluorinated co-polymer as stabilising agent. These beads have no permanent porosity although they have a high nominal cross-linking level. Their swelling in common organic solvents is comparable with those of Merrifield or TentaGel gel-type resins.
Substituent effect on solvolysis of 2-(aryldimethylsilyl)ethyl chlorides
作者:Ryoji Fujiyama、Toshihiro Munechika
DOI:10.1016/s0040-4039(00)73811-1
日期:1993.9
The solvolysis rates of 2-(aryldimethylsilyl)ethyl chlorides 3 were measured using a conductometric method. The analysis of the Yukawa-Tsuno LArSR equation gives a reaction constant of ϱ=−1.42 and a high resonance demand of r=1.48. This result indicates that the β-silicon effect is attributed to the cyclic transition state structure with a positive charge on the silicon in this primary system.
agonist to an antagonist. Our results indicate that silylethanols are useful for structural development, and vinylsilanes are a versatile source of hydrophobic building blocks for obtaining biofunctionalmolecules.
Solvolysisrates of 2-(aryldimethylsilyl)ethyl chlorides were determined conductimetrically in 60% (v/v) aqueous ethanol. The effects of aryl substituents at the silyl atom on the solvolysisrates ...