138886-49-4

Basic information

• Product Name: 4,4a-dihydro-4',5'-diphenylspiro<3H,10H-pyrano<4,3-b><1>benzopyran-3,2'-<1,3>dioxolan>-10-one
• CAS NO: 138886-49-4
• Molecular Weight: 412.442
• Mol File: 138886-49-4.mol
• Article Data: 2

Chemical Properties

• CAS DataBase Reference: 4,4a-dihydro-4',5'-diphenylspiro<3H,10H-pyrano<4,3-b><1>benzopyran-3,2'-<1,3>dioxolan>-10-one(CAS DataBase Reference)
• NIST Chemistry Reference: 4,4a-dihydro-4',5'-diphenylspiro<3H,10H-pyrano<4,3-b><1>benzopyran-3,2'-<1,3>dioxolan>-10-one(138886-49-4)
• EPA Substance Registry System: 4,4a-dihydro-4',5'-diphenylspiro<3H,10H-pyrano<4,3-b><1>benzopyran-3,2'-<1,3>dioxolan>-10-one(138886-49-4)

Safety Data

• Hazardous Substances Data: 138886-49-4(Hazardous Substances Data)

Upstream product

• 138886-49-4 C₂₆H₂₀O₅ 
• 5436-03-3 trans-2-bromomethyl-4,5-diphenyl-1,3-dioxolane 
• 655-48-1 DL-1,2-diphenylethane-1,2-diol 
• 17422-74-1 3-Formylchromone 
• 129381-41-5 trans-2-methylene-4,5-diphenyl-1,3-dioxolane 

Downstream Products

• 655-48-1 DL-1,2-diphenylethane-1,2-diol 
• 118668-79-4 methyl 4-oxo-3,4-dihydro-2H-1-benzopyran-2-ylacetate 
• 129381-41-5 trans-2-methylene-4,5-diphenyl-1,3-dioxolane 
• 138886-49-4 4,4a-dihydro-4',5'-diphenylspiro<3H,10H-pyrano<4,3-b><1>benzopyran-3,2'-<1,3>dioxolan>-10-one 
• 138886-49-4 4,4a-dihydro-4',5'-diphenylspiro<3H,10H-pyrano<4,3-b><1>benzopyran-3,2'-<1,3>dioxolan>-10-one 
• 5436-03-3 trans-2-bromomethyl-4,5-diphenyl-1,3-dioxolane 

Relevant articles and documents

Heterodiene cycloadditoins of C2 symmetric 4,5-disubstituted ketene acetals: the nett asymmetric conjugate addition of recyclable acetic ester enolate equivalents to an activated enone

Heterodiene cycloadditions of 3-formylchromone 2 to a series of ketene acetals 1 derived from C2 symmetric 1,2-diarylethane-1,2-diols are diastereoselective.From (S,S)-1,2-di(o-tolyl)ethane-1,2-diol 6c the major cycloadduct 3c was isolated by crystallization and transformed by acid-catalysed methanolysis into (S)-methyl 4-oxo-3,4-dihydro-2H-1-benzopyran-2-ylacetate 5, together with the original 1,2-diol 6c which could be recycled.The structures of two cyclic carbonates 22a and 22c were determined by X-ray diffraction and used as models in seeking a mechanistic rationale for the stereoselective cycloadditions of the analogous ketene acetals 1a and 1c.