Ethynylsilanes, RnSi(CCH)4-n (n = 0 to 3), can be prepared in satisfactory yields from RnSiCl4-n and HCCMgCl in tetrahydrofuran. Losses occur through (a) polymerization under the influence of the cyclic ether and (b) metallation of the ethynylsilanes to SiCCMgCl which provokes the formation of sila-acetylene chains and rings. Some of these compounds of higher molecular weight have been isolated
乙炔基硅烷R n Si(CCH)4-n(n = 0至3),可以由R n SiCl 4-n和HCCMgCl在四氢呋喃中以令人满意的产率制备。损失是通过(a)在环醚的影响下聚合和(b)乙炔基硅烷金属化成SiCCMgCl引起的,从而促使形成硅乙炔链和环。这些高分子量化合物中的一些已经被分离出来。
Synthesis of the Entire Framework of Tartrolon B Utilizing a Silicon-Tethered Ring-Closing Metathesis Strategy
作者:Yi Jin Kim、Daesung Lee
DOI:10.1021/ol061952y
日期:2006.11.9
A tandem ring-closing metathesis (RCM) of silaketal-tethered dienynes gives rise to bicyclic siloxanes, which upon removal of the silicon tether afford dienediol skeletons with a stereodefined E,Z-1,3-diene motif. The implementation of this methodology has led to the construction of the entire C1-C21 linear carbon skeleton of tartrolon B.
Fourfold Diels-Alder Reaction of Tetraethynylsilane
作者:Florian L. Geyer、Alexander Rode、Uwe H. F. Bunz
DOI:10.1002/chem.201404799
日期:2014.12.8
tetraethynylsilane, was treated with tetraphenylcyclopentadienone at 300 °C under microwave irradiation to give the aromatized Diels–Alderadducts as sterically encumbered mini‐dendrimers with up to 20 benzene rings. The sterically most congested adducts display red‐shifted emission through intramolecular π–π interactions in the excited state.
Bi- and tridentate silicon-based acceptor molecules
作者:Jan Horstmann、Jan-Hendrik Lamm、Till Strothmann、Beate Neumann、Hans-Georg Stammler、Norbert W. Mitzel
DOI:10.1515/znb-2017-0031
日期:2017.5.24
or three Lewis-acidic sidearms. With the aim of providing host-guest complexes, the air-stable and readily soluble compounds 5–8 were converted with N- and O-Lewis bases of different size and geometry. In all cases, NMR spectroscopic investigations reveal no formation of Lewis acid-base complexes. X-ray diffraction experiments of host compounds 5–7 show intermolecular aryl…perfluoroaryl interactions