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Related Concept Videos

Protecting Groups for Aldehydes and Ketones: Introduction01:23

Protecting Groups for Aldehydes and Ketones: Introduction

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Protecting groups are compounds that can bind to a specific functional group in the presence of other functional groups to protect them from undesired chemical reactions. These compounds can selectively bind to particular functional groups and advance chemoselective reactions in polyfunctional systems (Figure 1). After the functional group has served its purpose, it is removed by reacting it with specific compounds.
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Protection of Alcohols02:31

Protection of Alcohols

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This lesson delves into the concept of protection and deprotection of a functional group fundamental to synthetic organic chemistry. These phenomena are explained in the context of aliphatic and aromatic alcohols.
Protection
It defines a protecting group as the masking agent to make the more reactive species inert to a given set of conditions. This concept is depicted via the illustration of liquid flow through different outlets in an assembly of pipes. The analogy helps to understand the role...
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Acetals and Thioacetals as Protecting Groups for Aldehydes and Ketones01:24

Acetals and Thioacetals as Protecting Groups for Aldehydes and Ketones

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Acetals are formed by reacting two equivalents of alcohol with carbonyl compounds like aldehydes or ketones. Acetals are unaffected by bases, nucleophiles, oxidizing agents, and reducing agents. They serve as protecting groups for aldehydes and ketones. Acetals can be easily formed and also easily removed via mild acid hydrolysis.
In the presence of multiple functional groups, when selective reduction of one group over the other is desired, groups like aldehydes and ketones that form acetals...
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Defenses Against Pathogens and Herbivores02:26

Defenses Against Pathogens and Herbivores

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Plants present a rich source of nutrients for many organisms, making it a target for herbivores and infectious agents. Plants, though lacking a proper immune system, have developed an array of constitutive and inducible defenses to fend off these attacks.
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Biosynthesis in Bacteria

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Biosynthesis in bacteria is a fundamental anabolic process that generates essential macromolecules, including proteins, nucleic acids, lipids, and polysaccharides. These macromolecules are critical for cellular growth, replication, and function. The process is tightly regulated and energetically linked to catabolic pathways to ensure optimal resource utilization.Biosynthetic pathways begin with precursor metabolites such as pyruvate, acetyl-CoA, and glucose-6-phosphate derived from glycolysis,...
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SN2 Reaction: Stereochemistry02:23

SN2 Reaction: Stereochemistry

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In an SN2 reaction, the nucleophilic attack on the substrate and departure of the leaving group occurs simultaneously through a transition state. As the nucleophile approaches the substrate from the back-side, the configuration of the substrate carbon changes from tetrahedral to trigonal bipyramidal and then back to tetrahedral, leading to an inversion in the configuration of the product.
If the substrate is an achiral molecule at the α-carbon, the inversion of configuration is not...
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Related Experiment Video

Updated: Jan 7, 2026

A Direct, Early Stage Guanidinylation Protocol for the Synthesis of Complex Aminoguanidine-containing Natural Products
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Protecting Group Strategies in Natural Product Biosynthesis.

Akimasa Miyanaga1,2, Yohei Katsuyama1,2

  • 1Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan.

Journal of Natural Products
|January 5, 2026
PubMed
Summary

Nature

Area of Science:

  • Organic Chemistry
  • Biochemistry
  • Metabolic Engineering

Background:

  • Protecting groups are essential in synthetic organic chemistry for masking reactive functional groups.
  • Biosynthetic systems were traditionally thought to lack protecting groups due to enzymatic selectivity.
  • Recent findings indicate natural product biosynthesis employs protection-deprotection strategies.

Purpose of the Study:

  • To review the current understanding of protection-deprotection mechanisms in natural product biosynthesis.
  • To highlight the role of these mechanisms in regulating biosynthetic intermediates.
  • To explore implications for pathway engineering and chemoenzymatic synthesis.

Main Methods:

  • Literature review of recent studies on natural product biosynthesis.

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  • Analysis of enzymatic protection and deprotection strategies in biological systems.
  • Synthesis of current knowledge on natural protection-deprotection mechanisms.

    • Main Results:

    • Enzymes in certain microorganisms and plants utilize temporary protecting group modifications.
    • These modifications regulate intermediate reactivity, ensuring pathway fidelity.
    • Enzymatic removal of protecting groups yields final bioactive metabolites.

    Conclusions:

    • Natural product biosynthesis involves sophisticated protection-deprotection strategies.
    • Understanding these mechanisms enhances knowledge of enzymatic chemistry.
    • These natural strategies offer inspiration for synthetic methodology and pathway engineering.