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Related Concept Videos

Preparation and Reactions of Sulfides02:26

Preparation and Reactions of Sulfides

Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
Sharpless Epoxidation02:57

Sharpless Epoxidation

The conversion of allylic alcohols into epoxides using the chiral catalyst was discovered by K. Barry Sharpless and is known as Sharpless epoxidation. The use of a chiral catalyst enables the formation of one enantiomer of the product in excess. This chiral catalyst is mainly a chiral complex of titanium tetraisopropoxide and tartrate ester (specific stereoisomer). The stereoisomer used in the chiral catalyst dictates the formation of the enantiomer of the product. In other words, the use of...
Role of Skin in Vitamin D Synthesis01:23

Role of Skin in Vitamin D Synthesis

The skin plays a crucial role in the synthesis of vitamin D, a vital nutrient for various physiological processes in the body. Vitamin D is unique because it can be synthesized in the skin through a series of chemical reactions triggered by exposure to ultraviolet B (UVB) radiation from sunlight.
The solar UV B rays (290-315 nm) are absorbed by the skin, and 7-dehydrocholesterol (provitamin D3) photolyzes it to previtamin D3, which undergoes a rapid transformation to vitamin D3(cholecalciferol).
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide02:44

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
Preparation and Reactions of Thiols02:33

Preparation and Reactions of Thiols

Thiols are prepared using the hydrosulfide anion as a nucleophile in a nucleophilic substitution reaction with alkyl halides. For instance, bromobutane reacts with sodium hydrosulfide to give butanethiol.
Synthesis of Phosphatidylcholine in the ER Membrane01:27

Synthesis of Phosphatidylcholine in the ER Membrane

The ER synthesizes lipids for building cell membranes and performing cellular functions such as energy storage and signaling. The lipid synthesis machinery embedded in the ER membrane primarily collects all reactants from the cytosol. Following synthesis, the secretory pathway and the ER contact sites distribute these lipids to other cellular organelles. Additionally, the energy-rich triacylglycerides are transported from the ER via lipid droplets.
The major components of all eukaryotic cell...

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Synthesis of Biocompatible Liquid Crystal Elastomer Foams as Cell Scaffolds for 3D Spatial Cell Cultures
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Synthesis of Biocompatible Liquid Crystal Elastomer Foams as Cell Scaffolds for 3D Spatial Cell Cultures

Published on: April 11, 2017

Direct synthesis of chrysosplenol D.

George Kraus1, Sudipta Roy

  • 1Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA. gakraus@iastate.edu

Journal of Natural Products
|October 16, 2008
PubMed
Summary

Researchers directly synthesized chrysosplenol D, an efflux pump inhibitor. This compound enhances the effectiveness of key antibiotics and antimalarials, offering new therapeutic possibilities.

Area of Science:

  • Organic Chemistry
  • Medicinal Chemistry
  • Drug Discovery

Background:

  • Chrysosplenol D is an efflux pump inhibitor.
  • Efflux pumps contribute to multidrug resistance in pathogens.
  • Potentiating antibiotics and antimalarials is crucial for combating resistant infections.

Purpose of the Study:

  • To develop a direct synthesis of chrysosplenol D.
  • To explore chrysosplenol D as a potentiator for existing antimicrobial drugs.

Main Methods:

  • Aldol condensation reaction.
  • Algar-Flynn-Oyamada oxidative cyclization.
  • Chemical synthesis of chrysosplenol D.

Main Results:

  • Successful direct synthesis of chrysosplenol D.

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Synthesis and Characterization of 1,2-Dithiolane Modified Self-Assembling Peptides
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  • Demonstrated potential of chrysosplenol D to inhibit efflux pumps.
  • Chrysosplenol D potentiated the activity of antibiotics and antimalarials.
  • Conclusions:

    • The developed synthetic route provides access to chrysosplenol D.
    • Chrysosplenol D shows promise as an adjuvant therapy to overcome drug resistance.
    • Further investigation into chrysosplenol D's clinical applications is warranted.