Palladium nanoparticle deposition on spherical carbon supports for heterogeneous catalysis in continuous flow

Boyall, Sarah L.; Berman, Phoebe; Griffiths, Anthony; Massey, Alexander; Dixon, Thomas; Shaw, Thomas; Miller, Joanna; White, Jonathan P.; Menzel, Robert; Leslie, Kevin; Clemens, Graeme; Muller, Frans L.; Bourne, Richard A.; Chamberlain, Thomas W.

doi:10.1039/d3cy01718d

Catal. Sci. Technol.

2024

DOI: 10.1039/d3cy01718d

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Palladium nanoparticle deposition on spherical carbon supports for heterogeneous catalysis in continuous flow

Sarah L. Boyall,

Phoebe Berman,

Anthony Griffiths

et al.

Abstract: Heterogeneous catalysis is widely exploited by the chemical industry, both in batch reactors and in continuous flow, the latter via the use of packed bed reactors. Unfortunately, the transfer of...

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Automated Optimization of a Multistep, Multiphase Continuous Flow Process for Pharmaceutical Synthesis

Boyall,

Clarke,

Dixon

et al. 2024

ACS Sustainable Chem. Eng.

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Flow synthesis is becoming increasingly relevant as a sustainable and safe alternative to traditional batch processes, as reaction conditions that are not usually achievable in batch chemistry can be exploited (for example, higher temperatures and pressures). Telescoped continuous reactions have the potential to reduce waste by decreasing the number of separate unit operations (e.g., crystallization, filtration, washing, and drying), increase safety due to limiting operator interaction with potentially harmful materials that can be reacted in subsequent steps, minimize supply chain disruption, and reduce the need to store large inventories of intermediates as they can be synthesized on demand. Optimization of these flow processes leads to further efficiency when exploring new reactions, as with a higher yield comes higher purity, reduced waste, and a greener synthesis. This project explored a two-step process consisting of a threephase heterogeneously catalyzed hydrogenation followed by a homogeneous amidation reaction. The steps were optimized individually and as a multistep telescoped process for yield using remote automated control via a Bayesian optimization algorithm and HPLC analysis to assess the performance of a reaction for a given set of experimental conditions. 2-MeTHF was selected as a green solvent throughout the process, and the heterogeneous step provided good atom economy due to the use of pure hydrogen gas as a reagent. This research highlights the benefits of using multistage automated optimization in the development of pharmaceutical syntheses. The combination of telescoping and optimization with automation allows for swift investigation of synthetic processes in a minimum number of experiments, leading to a reduction in the number of experiments performed and a large reduction in process mass intensity values.

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Automated Optimization of a Multistep, Multiphase Continuous Flow Process for Pharmaceutical Synthesis

Boyall,

Clarke,

Dixon

et al. 2024

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

show abstract

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Palladium nanoparticle deposition on spherical carbon supports for heterogeneous catalysis in continuous flow

Abstract: Heterogeneous catalysis is widely exploited by the chemical industry, both in batch reactors and in continuous flow, the latter via the use of packed bed reactors. Unfortunately, the transfer of...

Cited by 1 publication

References 45 publications

Automated Optimization of a Multistep, Multiphase Continuous Flow Process for Pharmaceutical Synthesis

Automated Optimization of a Multistep, Multiphase Continuous Flow Process for Pharmaceutical Synthesis

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