Triphenylethylphosphonium bromide

CAS 1530-32-1, Cat. No EN300-52977
Reagent for Wittig reaction

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Triphenylethylphosphonium bromide (TEP) is a phosphonium salt that entails the transfer of an ethylidene group by generation of the ‘nonstabilized’ phosphorus ylide to aldehydes and ketones. It is a white to off-white solid, that is shelf-stable but is moister sensitive. The advantage of the synthetic approach is the fact that the stereoselectivity of the reaction with ylide is predictable and controllable, resulting in moderate to good yields¹. This reagent can be used in the Schlosser modification of the Wittig reaction¹.

Synonyms: ethyltriphenylphosphonium bromide (6CI, 7CI); phosphonium, ethyltriphenyl-, bromide (8CI, 9CI); TEP (onium compound); ethyltriphenylphosphanium bromide