21939-12-8

Basic information

• Product Name: 2,3,5-Triphenyl-tetrahydro-pyrrolo[3,4-d]isoxazole-4,6-dione
• Synonyms: 2,3,5-Triphenyl-tetrahydro-pyrrolo[3,4-d]isoxazole-4,6-dione
• CAS NO: 21939-12-8
• Molecular Weight: 370.408
• Mol File: 21939-12-8.mol
• Article Data: 3

Chemical Properties

• CAS DataBase Reference: 2,3,5-Triphenyl-tetrahydro-pyrrolo[3,4-d]isoxazole-4,6-dione(CAS DataBase Reference)
• NIST Chemistry Reference: 2,3,5-Triphenyl-tetrahydro-pyrrolo[3,4-d]isoxazole-4,6-dione(21939-12-8)
• EPA Substance Registry System: 2,3,5-Triphenyl-tetrahydro-pyrrolo[3,4-d]isoxazole-4,6-dione(21939-12-8)

Safety Data

• Hazardous Substances Data: 21939-12-8(Hazardous Substances Data)

Upstream product

• 941-69-5 N-phenyl-maleimide 
• 3376-40-7 N-benzyl-N-phenylhydroxylamine 
• 1137-96-8 N-(benzylidene)aniline N-oxide 
• 201024-81-9 C,N-diphenylnitrone 

Downstream Products

• 941-69-5 N-phenyl-maleimide 
• 201024-81-9 C,N-diphenylnitrone 

Relevant articles and documents

Visible-light photoredox-catalyzed synthesis of nitrones: Unexpected rate acceleration by water in the synthesis of isoxazolidines

A new oxidative [3 + 2] cycloaddition of N-substituted hydroxylamines with alkenes was established under visible light photoredox catalysis. This novel protocol provides a rapid, mild, and efficient access to valuable five-membered ring isoxazolidine heterocycles in a concise fashion.

The nature of lithium perchlorate and gallium chloride salt effect in cycloaddition reactions

Comparing the acceleration effects of (4 + 2)-, (3 + 2)- and (2 + 2)-cycloaddition reactions in the presence of the salts of two types: gallium chloride in inert solvents and lithium perchlorate (LP) in diethyl ether (DE) it was observed that in the presence of GaCl3 the acceleration effect is approximately the same (104 times) for the studied reactions, while in LPDE medium for the same reactions strong increase (up to 104 times), weak increase or even decrease of the rate and equilibrium constants take place even with the common dienophile depending on the nature of the second reagent. it was suggested that the acceleration effect of cycloaddition reactions in the presence of such Lewis acids as aluminum, gallium or boron halides is due to the sharp increase of Π-acceptor properties of dienophiles and therefore increasing energy of orbital interaction, whereas LPDE medium demonstrates strong stabilization of static and/or dynamic polar forms and favors reactions with charge control.