98016-51-4

Basic information

• Product Name: 1,4-Diaethoxycarbonyl-but-2,3-dioxo-butan-diyliden-bis-triphenyl-phosphoran
• Synonyms: 1,4-Diaethoxycarbonyl-but-2,3-dioxo-butan-diyliden-bis-triphenyl-phosphoran
• CAS NO: 98016-51-4
• Molecular Weight: 750.768
• Mol File: 98016-51-4.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 1,4-Diaethoxycarbonyl-but-2,3-dioxo-butan-diyliden-bis-triphenyl-phosphoran(CAS DataBase Reference)
• NIST Chemistry Reference: 1,4-Diaethoxycarbonyl-but-2,3-dioxo-butan-diyliden-bis-triphenyl-phosphoran(98016-51-4)
• EPA Substance Registry System: 1,4-Diaethoxycarbonyl-but-2,3-dioxo-butan-diyliden-bis-triphenyl-phosphoran(98016-51-4)

Safety Data

• Hazardous Substances Data: 98016-51-4(Hazardous Substances Data)

Upstream product

• 79-37-8 oxalyl dichloride 
• 1099-45-2 ethyl (triphenylphosphoranylidene)acetate 

Relevant articles and documents

Flash vacuum pyrolysis of stabilised phosphorus ylides. Part 8. Preparation of symmetrical and unsymmetrical 1,3-diynes from alkynoyl ylides and oxalyl diylides

Seven examples of the alkynoyl phosphorus ylides 5 have been prepared and are found, upon flash vacuum pyrolysis (FVP) at 750°C, to undergo extrusion of Ph3PO to give the unsymmetrical 1,3-diynes 9 in moderate yield. Six examples of the oxalyl diylides 6 have been prepared and their fully assigned 13C NMR spectra are presented. Upon FVP, those with R = aryl undergo two-fold extrusion of Ph3PO to give symmetrical 1,3-diynes 13 but this requires the unusually severe temperature of 900°C. In contrast those with R = CO2Me, CO2Et or COPh undergo complete reaction at 500°C but afford only Ph3PO and fragmentation products.