131292-09-6

Basic information

• Product Name: ethyl 5-(2-methylphenyl)-3-oxo-2-triphenylphosphoranylidenepent-4-ynoate
• Synonyms: ethyl 5-(2-methylphenyl)-3-oxo-2-triphenylphosphoranylidenepent-4-ynoate
• CAS NO: 131292-09-6
• Molecular Weight: 490.538
• Mol File: 131292-09-6.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: ethyl 5-(2-methylphenyl)-3-oxo-2-triphenylphosphoranylidenepent-4-ynoate(CAS DataBase Reference)
• NIST Chemistry Reference: ethyl 5-(2-methylphenyl)-3-oxo-2-triphenylphosphoranylidenepent-4-ynoate(131292-09-6)
• EPA Substance Registry System: ethyl 5-(2-methylphenyl)-3-oxo-2-triphenylphosphoranylidenepent-4-ynoate(131292-09-6)

Safety Data

• Hazardous Substances Data: 131292-09-6(Hazardous Substances Data)

Upstream product

• 131292-15-4 o-Tolyl-propynoyl chloride 
• 1099-45-2 ethyl (triphenylphosphoranylidene)acetate 
• 7515-27-7 3-(2-methylphenyl)prop-2-ynoic acid 
• 58686-71-8 ethyl 3-(2-methylphenyl)prop-2-ynoate 

Downstream Products

• 791-28-6 Triphenylphosphine oxide 
• 131292-30-3 1-(buta-1,3-diyn-1-yl)-2-methylbenzene 

Relevant articles and documents

Flash Vacuum Pyrolysis of Stabilised Phosphorous Ylides. Part 4. Stepwise Construction of Terminal 1,3-Diynes, Conjugated Diacetylenic Esters and a Triacetylenic Ester

Thirteen examples of stabilised alkynol ylides 6 have been prepared and are found, upon flash vacuum pyrolysis (FVP) at 500 deg C, to undergo extrusion of Ph3PO to give the diacetylenic esters 7 in moderate yield.At 750 deg C the same ylides afforded terminal 1,3-diynes 8 although often in poor yield.For R = 2-MeSC6H4 both 7 and 8 undergo secondary loss of Me* and cyclisation to give 2-alkynylbenzothiophene derivatives 9 and 10 in low yield.The first example of an alkadiynol ylide 11 has been prepared and is converted by FVP at 500 deg C into the triacetylenic ester 12.