[en]

Triphenylcarbethoxymethylenephosphorane
Names
	Preferred IUPAC name Ethyl (triphenyl-λ5-phosphanylidene)acetate
	Other names (2-Ethoxy-2-oxoethylidene)triphenylphosphorane (Carbethoxymethylene)triphenylphosphorane; (Carbethoxymethylidene)triphenylphosphorane; (Ethoxycarbonylmethylidene)triphenylphosphorane Ethyl (triphenylphosphoranylidene)acetate
Identifiers
CAS Number	1099-45-2;
3D model (JSmol)	Interactive image;
ChemSpider	63836 ;
ECHA InfoCard	100.012.865
PubChem CID	24892754;
UNII	WX75SQL8ZF ;
CompTox Dashboard (EPA)	DTXSID7061485 ;
	InChI InChI=1/CH2N2O4/c4-2(5)1-3(6)7/h1H2;
	SMILES O=C(OCC)C=P(c1ccccc1)(c2ccccc2)c3ccccc3;
Properties
Chemical formula	C22H21O2P
Molar mass	348.382 g·mol−1
Melting point	124 to 129 °C (255 to 264 °F; 397 to 402 K)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Triphenylcarbethoxymethylenephosphorane is an organophosphorus compound with the chemical formula Ph₃PCHCO₂Et (Ph = phenyl, Et = ethyl). It is a white solid that is soluble in organic solvents.

The compound is a Wittig reagent. It is used to replace oxygen centres in ketones and aldehydes with CHCO₂Et.^[1]

References

^ Lang, R. W.; Hansen, H.-J. (1984). “α-Allenic Esters from α-Phosphoranylidene Esters and Acid Chlorides: Ethyl 2,3-Pentadienoate” (PDF). Organic Syntheses. 62: 202{{cite journal}}: CS1 maint: multiple names: authors list (link);Collected Volumes, vol. 7, p. 232.