198623-99-3

Basic information

• Product Name: (E)-1,1,1,3,5,5,5-heptamethyl-3-styryltrisiloxane
• Synonyms: (E)-1,1,1,3,5,5,5-heptamethyl-3-styryltrisiloxane
• CAS NO: 198623-99-3
• Molecular Weight: 324.643
• Mol File: 198623-99-3.mol
• Article Data: 7

Chemical Properties

• CAS DataBase Reference: (E)-1,1,1,3,5,5,5-heptamethyl-3-styryltrisiloxane(CAS DataBase Reference)
• NIST Chemistry Reference: (E)-1,1,1,3,5,5,5-heptamethyl-3-styryltrisiloxane(198623-99-3)
• EPA Substance Registry System: (E)-1,1,1,3,5,5,5-heptamethyl-3-styryltrisiloxane(198623-99-3)

Safety Data

• Hazardous Substances Data: 198623-99-3(Hazardous Substances Data)

Upstream product

• 1873-88-7 1,1,1,3,5,5,5-heptamethyltrisiloxan 
• 536-74-3 phenylacetylene 
• 100-42-5 styrene 

Relevant articles and documents

Regio- and Stereoselective Dehydrogenative Silylation and Hydrosilylation of Vinylarenes Catalyzed by Ruthenium Alkylidenes

Development of regio- and stereoselective dehydrogenative silylation and hydrosilylation of vinylarenes with alkoxysilanes, catalyzed by ruthenium alkylidenes, is described. Varying L- and X-type ligands on ruthenium alkylidenes permits selective access to either (E)-vinylsilanes or β-alkylsilanes with high regio- and stereocontrol. cis,cis-1,5-Cyclooctadiene was identified as the most effective sacrificial hydrogen acceptor for the dehydrogenative silylation of vinylarenes, which allows use of a nearly equimolar ratio of alkenes and silanes.

Manganese-Catalyzed Dehydrogenative Silylation of Alkenes following Two Parallel Inner-Sphere Pathways

We report on an additive-free Mn(I)-catalyzed dehydrogenative silylation of terminal alkenes. The most active precatalyst is the bench-stable alkyl bisphosphine Mn(I) complex fac-[Mn(dippe)(CO)3(CH2CH2CH3)]. The catalytic process is initiated by migratory insertion of a CO ligand into the Mn-alkyl bond to yield an acyl intermediate which undergoes rapid Si-H bond cleavage of the silane HSiR3 forming the active 16e- Mn(I) silyl catalyst [Mn(dippe)(CO)2(SiR3)] together with liberated butanal. A broad variety of aromatic and aliphatic alkenes was efficiently and selectively converted into E-vinylsilanes and allylsilanes, respectively, at room temperature. Mechanistic insights are provided based on experimental data and DFT calculations revealing that two parallel reaction pathways are operative: an acceptorless reaction pathway involving dihydrogen release and a pathway requiring an alkene as sacrificial hydrogen acceptor.

[Rh(Cod)Cl]2/Pph3?catalyzed dehydrogenative silylation of styrene derivatives with NBE as a hydrogen acceptor

Direct synthesis of arylalkenylsilanes by [Rh(COD)Cl]2/ PPh3-catalyzed dehydrogenative silylation of styrene derivatives with R3SiH (R = alkyl, alkoxy, aryl) was realized, in which norbornene (NBE) and PPh3 play a key role in achieving excellent selectivity in the formation of dehydrogenative silylation products. Moreover, this high-yielding transformation exhibits a broad substrate scope and good functional group tolerance.