109032-33-9

Basic information

• Product Name: Silane, [(4-ethynyl-1,2-phenylene)bis(oxy)]bis[(1,1-dimethylethyl)dimethyl-
• CAS NO: 109032-33-9
• Molecular Formula: C20H34O2Si2
• Molecular Weight: 362.66
• Mol File: 109032-33-9.mol
• Article Data: 5

Chemical Properties

• CAS DataBase Reference: Silane, [(4-ethynyl-1,2-phenylene)bis(oxy)]bis[(1,1-dimethylethyl)dimethyl-(CAS DataBase Reference)
• NIST Chemistry Reference: Silane, [(4-ethynyl-1,2-phenylene)bis(oxy)]bis[(1,1-dimethylethyl)dimethyl-(109032-33-9)
• EPA Substance Registry System: Silane, [(4-ethynyl-1,2-phenylene)bis(oxy)]bis[(1,1-dimethylethyl)dimethyl-(109032-33-9)

Safety Data

• Hazardous Substances Data: 109032-33-9(Hazardous Substances Data)

Upstream product

• 558-13-4 carbon tetrabromide 
• 99815-16-4 3,4-bis(tert-butyldimethylsilanyloxy)benzaldehyde 
• 139-85-5 3,4-dihydroxybenzaldehyde 
• 18162-48-6 tert-butyldimethylsilyl chloride 
• 109032-32-8 {[4-(2,2-dibromovinyl)-1,2-phenylene]bis-(oxy)}bis(tert-butyldimethylsilane) 

Downstream Products

• 633-65-8 berberine chloride 
• 1173113-65-9 1,2-bis-(tert-butyldimethylsilanoxy)-4-(4-nitrophenylethynyl)benzene 
• 83644-00-2 (E)-1,5-bis(3',4'-dihydroxyphenyl)pent-4-en-1-yne 
• 147666-80-6 Thunberginol A 
• 917249-21-9 5-[3,4-bis(tert-butyldimethylsilanyloxy)phenylethynyl]-2,2-dimethyl-1,3-benzodioxin-4-one 

Relevant articles and documents

Conjugation of Hydroxytyrosol with Other Natural Phenolic Fragments: From Waste to Antioxidants and Antitumour Compounds

Hydroxytyrosol, a natural polyphenol that can be extracted from olive mill waste waters, was converted into a series of more complex and lipophilic analogues by conjugation with other naturally derived (poly)phenolic fragments. Ether and triazole linkers were employed. A small library of compounds was prepared, stressing step economy and operational simplicity. Some of these substances were proven to have activity equal or superior to that of the parent hydroxytyrosol in radical scavenging assays as well as in cytotoxicity tests against tumour cells.

Regiocontrolled intramolecular cyclizations of carboxylic acids to carbon-carbon triple bonds promoted by acid or base catalyst

We systematically investigated, for the first time, the relationship between regioselectivity and acid/base effects in the cyclization reactions between carboxylic acids and carbon-carbon triple bonds. We found novel acid- and base-promoted cyclizations to selectively give isocoumarin or pyran-2(2H)-one and phthalide or furan-2(5H)-one skeletons, respectively, and established a catalytic version of regioselective heterocyclic ring synthesis. Density functional theory calculations and application to a short route to thunberginol A were also described.

Process for preparation of rooperol, hypoxoside and derivatives thereof

The invention provides a process for preparing compounds of formula (I) (wherein,RArepresents an unsubstituted phenyl group or a phenyl group substituted by up to 5 groups selected from hydroxy, alkoxy, alkylenedioxy, halide and acyloxy groups;, RBrepresents an unsubstituted phenyl group or a phenyl group substituted by up to 5 groups selected from hydroxy, alkoxy, alkylenedioxy, halide and acyloxy groups;, at least one of the groups RAand RBcarrying at least one hydroxy substituent; and, Z represents a hydrogen or hydroxy group);, which comprises subjecting a compound of formula (II) (wherein,RCrepresents an unsubstituted phenyl group or a phenyl group substituted by up to 5 groups selected from trialkylsilyloxy, alkoxy, alkylenedioxy, halide and acyloxy groups;, RDrepresents an unsubstituted phenyl group or a phenyl group substituted by up to 5 groups selected from trialkylsilyloxy, alkoxy, alkylenedioxy, halide and acyloxy groups;, at least one of the groups RCand RDcarrying at least one trialkylsilyloxy substituent; and, Z is as defined above), to alkylammonium fluoride or acid mediated hydrolysis. The invention also provides for the glucodisation of a compound of formula (I) or a compound of formula (II).