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Related Concept Videos

Preparation of Diols and Pinacol Rearrangement01:57

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Compounds bearing two hydroxyl groups are known as diols. When the hydroxyl groups are located on adjacent carbon atoms, the diols are called vicinal diols or glycols. Under acidic conditions, vicinal diols undergo a specific reaction called pinacol rearrangement.
The reaction begins with transferring a proton from the acid catalyst to one of the hydroxyl groups, producing an oxonium ion.
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[3,3] Sigmatropic Rearrangement of 1,5-Dienes: Cope Rearrangement01:21

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The Cope rearrangement is classified as a [3,3] sigmatropic shift in 1,5-dienes, leading to a more stable, isomeric 1,5-diene. The reaction involves a concerted movement of six electrons, four from two π bonds and two from a σ bond, via an energetically favorable chair-like transition state.
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The Diels–Alder reaction is one of the robust methods for synthesizing unsaturated six-membered rings. The reaction involves a concerted cyclic movement of six π electrons: four π electrons from the diene and two π electrons from the dienophile.
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The Diels–Alder reaction is an example of a thermal pericyclic reaction between a conjugated diene and an alkene or alkyne, commonly referred to as a dienophile. The reaction involves a concerted movement of six π electrons, four from the diene and two from the dienophile, forming an unsaturated six-membered ring. As a result, these reactions are classified as [4+2] cycloadditions.
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Cercosporin-Photocatalyzed [4+1]- and [4+2]-Annulations of Azoalkenes Under Mild Conditions
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Synthesis of cynaropicrin-d(4).

Takuya Sato1, Shihori Hara1, Makiko Sato1

  • 1Department of Materials and Life Sciences, Faculty of Science and Technology, Sophia University, 7-1 Kioicho, Chiyoda-ku, Tokyo 102-8554, Japan.

Bioorganic & Medicinal Chemistry Letters
|November 2, 2015
PubMed
Summary
This summary is machine-generated.

Researchers synthesized cynaropicrin-d4, a deuterated form of cynaropicrin, to aid in studying its effectiveness against human African trypanosomiasis (sleeping sickness). This new compound serves as a vital tool for pharmacokinetic analysis, advancing potential treatments.

Keywords:
CynaropicrinDeuteriumGuaianolidePharmacokinetic studyTrypanosoma brucei

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Area of Science:

  • Natural Product Chemistry
  • Medicinal Chemistry
  • Parasitology

Background:

  • Cynaropicrin, a sesquiterpene lactone, exhibits significant activity against Trypanosoma brucei.
  • Trypanosoma brucei causes human African trypanosomiasis (HAT), also known as sleeping sickness.
  • Effective therapeutic strategies for HAT remain a critical unmet medical need.

Purpose of the Study:

  • To synthesize a deuterated derivative of cynaropicrin, named cynaropicrin-d4.
  • To establish cynaropicrin-d4 as a valuable internal standard for analytical studies.
  • To facilitate pharmacokinetic investigations of cynaropicrin as a potential HAT therapeutic.

Main Methods:

  • Chemical synthesis of cynaropicrin-d4 via side-chain modification of natural cynaropicrin.
  • Utilizing liquid chromatography-mass spectrometry (LC-MS) for analysis.
  • Application as an internal standard in pharmacokinetic studies.

Main Results:

  • Successful synthesis of cynaropicrin-d4.
  • Demonstrated utility of cynaropicrin-d4 as an internal standard for LC-MS.
  • Established a method for quantifying cynaropicrin in biological samples.

Conclusions:

  • The synthesized cynaropicrin-d4 is a suitable internal standard for LC-MS analysis.
  • This deuterated derivative will aid in the pharmacokinetic evaluation of cynaropicrin.
  • The study supports the further development of cynaropicrin as a potential treatment for sleeping sickness.