917249-21-9

Basic information

• Product Name: 5-[3,4-bis(tert-butyldimethylsilanyloxy)phenylethynyl]-2,2-dimethyl-1,3-benzodioxin-4-one
• Synonyms: 5-[3,4-bis(tert-butyldimethylsilanyloxy)phenylethynyl]-2,2-dimethyl-1,3-benzodioxin-4-one
• CAS NO: 917249-21-9
• Molecular Weight: 538.831
• Mol File: 917249-21-9.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 5-[3,4-bis(tert-butyldimethylsilanyloxy)phenylethynyl]-2,2-dimethyl-1,3-benzodioxin-4-one(CAS DataBase Reference)
• NIST Chemistry Reference: 5-[3,4-bis(tert-butyldimethylsilanyloxy)phenylethynyl]-2,2-dimethyl-1,3-benzodioxin-4-one(917249-21-9)
• EPA Substance Registry System: 5-[3,4-bis(tert-butyldimethylsilanyloxy)phenylethynyl]-2,2-dimethyl-1,3-benzodioxin-4-one(917249-21-9)

Safety Data

• Hazardous Substances Data: 917249-21-9(Hazardous Substances Data)

Upstream product

• 139-85-5 3,4-dihydroxybenzaldehyde 
• 154714-19-9 5-hydroxy-2,2-dimethyl-4H-benzo[d][1,3]dioxin-4-one 
• 109032-32-8 {[4-(2,2-dibromovinyl)-1,2-phenylene]bis-(oxy)}bis(tert-butyldimethylsilane) 
• 18162-48-6 tert-butyldimethylsilyl chloride 
• 99815-16-4 3,4-bis(tert-butyldimethylsilanyloxy)benzaldehyde 
• 303-07-1 2,6-Dihydroxybenzoic acid 
• 109032-33-9 1,2-bis(tert-butyldimethylsilanyloxy)-4-ethynylbenzene 
• 164014-40-8 2,2-dimethyl-5-trifluoromethylsulfonyloxy-4H-(1,3)benzodioxin-4-one 

Downstream Products

• 147666-80-6 Thunberginol A 

Relevant articles and documents

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.