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Downstream Processing01:29

Downstream Processing

Downstream processing begins once fermentation is complete and involves a series of steps to recover and purify products such as acids, vitamins, antibiotics, or proteins.Cell HarvestingFor example, for intracellular protein-based products, the first step is harvesting the cells. This is typically achieved using centrifugation or filtration to separate the cells from the liquid phase.Cell Disruption for Intracellular ProductsIf the target product is intracellular, the harvested cells must be...

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An Automated Purification Workflow Coupled with Material-Sparing High-Throughput 1H NMR for Parallel Medicinal

Justin Bellenger1, Martin R M Koos1, Melissa Avery1

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A new automated platform enables high-throughput purification and characterization of organic compounds using mass spectrometry and nuclear magnetic resonance spectroscopy, even with limited material.

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Area of Science:

  • Medicinal Chemistry
  • Analytical Chemistry

Background:

  • Increasing synthesis of organic compounds at smaller scales presents purification and characterization challenges.
  • Traditional methods struggle with limited sample sizes common in modern drug discovery.

Purpose of the Study:

  • To develop a parallel medicinal chemistry (PMC)-tailored platform for automated purification and characterization.
  • To integrate automated purification with mass spectrometry (MS) and nuclear magnetic resonance spectroscopy (NMR) for high-throughput analysis.
  • To enable quality NMR analysis from minimal sample quantities (as low as 10 μg).

Main Methods:

  • Coupling automated purification with MS and NMR on a range of synthetic scales (3.0-75.0 μmol).
  • Integrating 1.7 mm NMR sample generation into a high-throughput automated workflow.
  • Utilizing 'dead volume' for NMR sample generation, preserving material for biological assays.

Main Results:

  • The platform processes up to 36,000 compounds annually.
  • Quality NMR spectra are obtainable from microgram quantities of material.
  • Automated structure verification is achieved through integrated analysis.

Conclusions:

  • This platform addresses the challenge of analyzing limited quantities of synthesized compounds.
  • It enables NMR to become a vital tool for high-throughput analysis, comparable to UPLC-MS.
  • The technology supports the trend towards miniaturized parallel medicinal chemistry synthesis.