Selectivity of Grignard reagent formation – from semi-batch to continuous lab and pilot scale

05 September 2023, Version 1
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

The formation of Grignard reagents from metallic magnesium and a halide is often accompanied by the formation of the Wurtz coupling product, an undesired side product formed by the reaction of a Grignard reagent molecule and a halide molecule. By using a scale-up approach from semi-batch type synthesis to continuous lab and pilot scale for various Grignard reagents, it is demonstrated that a continuous production process can improve Grignard reagent selectivity and reduce Wurtz coupling.

Keywords

Grignard reagent formation
scale-up
organometallic synthesis
flow chemistry
selectivity

Supplementary materials

Title
Description
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Title
Selectivity of Grignard reagent formation – from semi-batch to continuous lab and pilot scale
Description
Reaction conditions, analytical data, and infrared spectra specific for each Grignard reagent, temperature profiles for benzylmagnesium bromide synthesis (PDF)
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