177594-69-3

Upstream product

• 38002-45-8 3-bromo-1-(trimethylsilyl)-1-propyne 
• 80-10-4 diphenylsilyl dichloride 
• 1730-25-2 allylmagnesium bromide 

Downstream Products

• 848820-81-5 1,1-Diphenyl-3,4-bis-[1-trimethylsilanyl-meth-(E)-ylidene]-silolane 
• 213462-89-6 s-cis(E,E) 1,1-diphenyl-3,4-bis(trimethylsilylmethylene)-1-silacyclopentane 
• 213463-07-1 Si(C₆H₅)2(CH₂C₂Si(CH₃)3)2Zr(C₅H₅)2 
• 213462-90-9 1,1-Diphenyl-3-[1-trimethylsilanyl-meth-(E)-ylidene]-4-[1-trimethylsilanyl-meth-(Z)-ylidene]-silolane 

Relevant academic research and scientific papers

Stereoselective polycyclisations of allyl and enyne silanes: Evidence for bicyclo[3.2.0]hept-1(7)ene structure

The intramolecular copper(I)-catalyzed [2 + 2]-photocycloaddition of diphenyldiallysilane (1) (or tetraallylsilane (4)) led to sila-3-bicyclo[3.2.0]heptane (3) (or to spiro analogous 6) in the cis (or cis-cis) configuration whereas the α,ω-diiodide (2) obtained by cyclozirconation of 1 (or from the homologous tetraiodide 5) followed by addition of n-BuLi, produced the sila-3-bicyclo[3.2.0]heptane (3) (or to the spiro analogous 6) in the trans (or trans-trans configuration). The same cyclozirconation reaction, starting from the hetero enyne 7, selectively led to the highly strained silacyclobutene moiety 15 which represents the first stable hetero bicyclo[3.2.0]hept-1(7)ene skeleton, hypothetical intermediate in methathesis reactions.

Stereoselective synthesis of new hetero(P, Si, Ge, Sn)cyclic derivatives from zirconium diyne and diene complexes

The dipropargylic derivatives of Si, Ge, P, 1a-c, react with the zirconocene entity 'Cp2Zr' and give the intermediate bicyclocomplexes 2a-c characterized by 1H and 31P-NMR. The electrophilic addition of H+, Br2 leads to the corresponding exo dienic metallacyclopentanes 3,4. The cyclozirconation reaction with hetero-diallylic compounds 5a-d gives the metallacyclopentanes 7-15, after reaction with different electrophiles such as H+, PCl3, PhPCl2, Ph2PCl or Ph2PCl(BH3), Br2. The cyclozirconation reaction of diynes is stereoselective and leads to the E,E-exocyclic dienes whereas the selectivity of cyclozirconation of dienes depends on the substituents on the heteroatom.