Triphenylcarbethoxymethylenephosphorane

Triphenylcarbethoxymethylenephosphorane
Names

Other names (2-Ethoxy-2-oxoethylidene)triphenylphosphorane (Carbethoxymethylene)triphenylphosphorane (Carbethoxymethylidene)triphenylphosphorane (Ethoxycarbonylmethylidene)triphenylphosphorane Ethyl (triphenylphosphoranylidene)acetate
Identifiers
CAS Number	1099-45-2
ChemSpider	63836^Y
Jmol interactive 3D	Image
PubChem	24892754
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	348.38 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). Org. Synth. 62: 202. ; Coll. Vol. 7, p. 232

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