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Related Concept Videos

Oxidation and Reduction of Organic Molecules01:19

Oxidation and Reduction of Organic Molecules

Energy production within a cell involves many coordinated chemical pathways. Most of these pathways are combinations of oxidation and reduction reactions, which occur at the same time. An oxidation reaction strips an electron from an atom in a compound, and the addition of this electron to another compound is a reduction reaction. Because oxidation and reduction usually occur together, these pairs of reactions are called redox reactions.
The removal of an electron from a molecule, results in a...
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Phase I biotransformation reductive reactions are chemical processes that modify drugs by introducing or revealing polar functional groups via reduction. Enzymes called reductases catalyze these reactions, playing a pivotal role in drug metabolism by transforming lipophilic drugs into more polar, water-soluble metabolites for easy excretion. An essential type of reductive reaction is the carbonyl group reduction, where aldehydes and ketones are reduced to alcohols. An example is the...
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Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...
Redox Reactions01:24

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Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
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Bioremediation is an environmentally sustainable process that employs living organisms—primarily microorganisms—to degrade or neutralize pollutants from contaminated environments. In oil spills and hydrocarbon pollution, bioremediation involves the use of hydrocarbon-degrading bacteria to transform toxic compounds into less harmful substances. This approach leverages natural microbial metabolic processes and is considered both cost-effective and ecologically favorable compared to physical or...
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Phase I biotransformation, or functionalization, is a crucial chemical process that converts drugs and other xenobiotics into more water-soluble forms, facilitating expulsion from the body. It involves oxidative, reductive, and hydrolytic reactions that add or unveil polar functional groups on lipophilic substrates. Key players in phase I reactions are the mixed-function oxidases. Situated in liver cell microsomes, these enzymes predominantly carry out drug metabolism. They require molecular...

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Recent biocatalytic oxidation-reduction cascades.

Joerg H Schrittwieser1, Johann Sattler, Verena Resch

  • 1Department of Chemistry, Organic and Bioorganic Chemistry, University of Graz, Heinrichstrasse 28, A-8010 Graz, Austria.

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Combining oxidation and reduction reactions in one pot offers economic and efficient chemical transformations. Recent advances in redox enzymes enable novel oxidation-reduction cascade strategies without intermediate isolation.

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Area of Science:

  • Biocatalysis
  • Organic Chemistry
  • Enzyme Engineering

Background:

  • Oxidation and reduction reactions are fundamental in chemical synthesis.
  • Performing sequential redox reactions in one pot is challenging due to incompatible conditions or intermediate instability.
  • The development of robust redox enzymes offers new possibilities for cascade reactions.

Purpose of the Study:

  • To explore the combination of oxidation and reduction reactions in a single reaction vessel.
  • To investigate the potential of enzyme-catalyzed oxidation-reduction cascades for efficient chemical synthesis.
  • To overcome the challenges of one-pot sequential redox transformations.

Main Methods:

  • Literature review of current oxidation-reduction cascade strategies.
  • Analysis of available redox enzymes for cascade applications.
  • Discussion of simultaneous versus stepwise one-pot reaction approaches.
  • Consideration of intermediate isolation and purification challenges.

Main Results:

  • Oxidation-reduction cascades can be performed economically and efficiently.
  • One-pot strategies (simultaneous or stepwise) are feasible without intermediate isolation.
  • Increased availability of diverse redox enzymes facilitates cascade development.

Conclusions:

  • Enzyme-catalyzed oxidation-reduction cascades represent a promising strategy for sustainable and efficient chemical synthesis.
  • Further research into novel enzyme combinations and reaction conditions can unlock broader applications.
  • One-pot redox cascades minimize waste and improve overall process efficiency.