The application of a monolithic triphenylphosphine reagent for conducting Ramirez gem-dibromoolefination reactions in flow

• Kimberley A. Roper¹
• Malcolm B. Berry²
• Steven V. Ley¹

• ¹ Innovative Technology Centre, Department of Chemistry, University of Cambridge, Cambridge, U.K.
• ² GlaxoSmithKline, Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2NY, U.K.

The application of a monolithic form of triphenylphosphine to the Ramirez gem-dibromoolefination reaction using flow chemistry techniques is reported. A variety of gem-dibromides were synthesised in high purity and excellent yield following only removal of solvent and no further off-line purification. It is also possible to perform the Appel reaction using the same monolith and the relationship between the mechanisms of the two reactions is discussed.

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