197172-17-1

Upstream product

• 3536-96-7 vinylmagnesium chloride 
• 536-74-3 phenylacetylene 
• 1745-72-8 dichlorodivinylsilane 
• 4440-01-1 lithium phenylacetylide 

Downstream Products

• 213009-79-1 2,5-Bis-(chloromethyl-dimethyl-silanyl)-3,4-diphenyl-1,1-divinyl-1H-silole 
• 1125652-55-2 2,7-bis[9-(9-borabicyclo[3.3.1]nonyl)]-1,6-diphenyl-5-silaspiro[4.4]nona-1,6-diene 
• 1228317-22-3 (C₆H₅)2(CHCH₂)2SiC₄(C₂H₅)B(C₂H₅)2 
• 213009-81-5 2,5-Bis-(iodomethyl-dimethyl-silanyl)-3,4-diphenyl-1,1-divinyl-1H-silole 

Relevant academic research and scientific papers

Alkynylsilanes and alkynyl(vinyl)silanes. synthesis, molecular structures and multinuclear magnetic resonance study

Alkynylsilanes bearing one to four alkynyl groups at silicon, with organyl groups (Me, Ph, Vin), H, Cl at silicon, and with substituents H, nBu, tBu, Ph, C6H4-4-Me, 3-thienyl, CH 2NMe2 at t

Combination of 1,2-hydroboration and 1,1-organoboration: A convenient route to 5-silaspiro[4,4]nona-1,6-diene derivatives

Dialkyn-1-yl(divinyl)silanes were prepared and their reactions with 9-borabicyclo[3.3.1]nonane (9-BBN) were studied. 1,2-Hydroboration takes place selectively at the vinyl group, followed by intramolecular 1,1-organoboration to form a 1-silacyclopent-2-ene ring. Repetition of this sequence affords, in essentially quantitative yield, 5-silaspiro[4,4]nona-1,6-diene derivatives bearing substituents in the 1,6-positions and 9-borabicyclo[3.3.1]nonyl groups in the 2,7-positions. Protodeborylation with an excess amount of acetic acid gives the respective spirosilanes bearing substituents only in the 1,6-positions. All new compounds were characterized by NMR spectroscopy in solution (1H, 11B, 13C, 29Si NMR) and for two examples of the spirosilanes by X-ray structural analysis in the solid state. Wiley-VCH Verlag GmbH & Co. KGaA, 2008.

Synthesis of some di- and tricyclic silaalkanes

The mono-, di- and spirocyclic silaalkanes 5, 6 and 9/10 are readily prepared from the di- and tetraallylsilanes 4 and 8 respectively by Cp2Zr induced ring forming reactions. The diallylsilole 16 reacts at 0°C and in presence of an excess of Cp2Zr to the tricyclic compound 19 whereas the silaspiro[4.4]nonadienes 21 and 22 are formed at room temperature. High stereoselectivity is observed in all of these Cp2Zr induced cyclization reactions.