Compounds having a vinyldimethylsilyl group at both terminals have been successfully cyclized by ruthenium hydride catalysts to give selectively disilacycles of various ring sizes via a metathetical reaction, i.e. ethene elimination from the two terminal vinyl groups, not involving metallocarbeneâmetallacyclobutane type intermediates.
Sila-Pharmaka, 26. Mitt. [1]. Darstellung und Eigenschaften potentiell curarewirksamer Silicium-Verbindungen, III / Sila-Pharmaca, 26th Communication [1]. Preparation and Properties of Silicon Compounds with Potential Curare-Like Activity, III
作者:Reinhold Tacke、Haryanto Linoh、Moayad T. Attar-Bashi、William S. Sheldrick、Ludger Ernst、Roland Niedner、Joachim Frohnecke
DOI:10.1515/znb-1982-1119
日期:1982.11.1
The potentially curare-like silicon compounds 8a-8f wore synthesized and investigated with respect to their structure-activity relationships. The conformations of the compounds in the solid state and in solution were studied by X-ray diffraction analysis (8a-8e) and 1H NMR spectroscopy (8a-8f), respectively. The muscle relaxing properties of 8a-8f were investigated on the mouse. The observed structure-activity
潜在的类箭毒硅化合物 8a-8f 被合成并研究了它们的结构-活性关系。分别通过 X 射线衍射分析 (8a-8e) 和 1 H NMR 光谱 (8a-8f) 研究了固态和溶液中化合物的构象。在小鼠身上研究了 8a-8f 的肌肉松弛特性。观察到的构效关系与神经肌肉阻滞剂的经典“14 Å 模型”不符。
TACKE, R.;LINOH, H.;ATTAR-BASHI, MOAYAD, T.;SHELDRICK, W. S.;ERNST, L.;NI+, Z. NATURFORSCH., 1982, 37, N 11, 1461-1471
作者:TACKE, R.、LINOH, H.、ATTAR-BASHI, MOAYAD, T.、SHELDRICK, W. S.、ERNST, L.、NI+
DOI:——
日期:——
Synthesis of Silylene−Alkylene−Silylene−Vinylene Polymers via Catalytic Silylative Coupling (SC) Polycondensation
作者:Bogdan Marciniec、Ewa Małecka、Marek Ścibiorek
DOI:10.1021/ma0217433
日期:2003.7.1
alpha,omega-Bis(vinyldimethylsilyl)alkanes (1-4) of the general formula CH2 = CH(CH3)(2)Si(CH2)n-(CH3)(2)SiCH =CH2 (where n = 1-4) undergo effective silylative coupling (SC) polycondensation, if catalyzed by [RuCl2(PPh3)(3)] (II) or [RuHCl(CO)(PPh3)(3)] (III), giving linear polymers (5-8) (M,, = 7300-8500) containing a mixture of trans-1,2- and gem-fragments, but in the presence of [RuCl2(CO)(3)}(2)] (1) as a catalyst, highly stereoselective trans-tactic linear polymers are isolated (9-12) (M-w = 6200-9200). The products of both new processes cannot be synthesized via ADMET polymerization or ring-closing metathesis (RCM).