Triphenylcarbethoxymethylenephosphorane

TriphenylcarbethoxymethyleneÂphosphorane
Names
	Preferred IUPAC name Ethyl (triphenyl-Î»5-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 gÂ·molâ1
Melting point	124 to 129 Â°C (255 to 264 Â°F; 397 to 402 K)
	Except where otherwise noted, data are given for materials in their standard state (at 25 Â°C [77 Â°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.

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

References