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Body:Improving a drug's stability in the gastrointestinal (GI) tract is paramount for enhancing its bioavailability and therapeutic effectiveness. Various strategies are employed to protect the drug from the harsh gastric milieu and to ensure its release and absorption at the desired site within the GI tract.Polymer coatings are one such method used to shield drugs from the stomach's acidic environment. By preventing premature drug release, these coatings improve the bioavailability of unstable...
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This lesson discusses the stability of substituted cyclohexanes with a focus on energies of various conformers and the effect of 1,3-diaxial interactions.
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Cyanohydrins are compounds that contain –CN and –OH groups on the same carbon atom. They are formed by the nucleophilic addition of the cyanide ions to the carbonyl group. Cyanide ions are highly basic and nucleophilic and can be generated from HCN under aqueous conditions. However, since HCN is a weak acid, the number of cyanide ions generated is very small. Hence, a small amount of base or KCN/NaCN is added to HCN to increase the concentration of the cyanide ions in the reaction...
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Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
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The enteral drug administration involves three primary routes: oral, sublingual, and buccal. Oral ingestion is the most prevalent, safe, economical, and convenient method for drug administration. However, it has certain drawbacks, including limited absorption due to the drug's low water solubility or poor membrane permeability, possible emesis from GI mucosa irritation, destruction of drugs by digestive enzymes or low gastric pH, and irregular absorption along with food or other drugs.
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Hexanoate-Cucurbit[7]uril: Highly Soluble with Controlled Release Ability.

Hao Chen1,2, Jin Zhang1,2, Qun Yu1

  • 1School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|April 29, 2020
PubMed
Summary
This summary is machine-generated.

Researchers developed hexanoate-cucurbit[7]uril (CB[7]C5 COONa), a novel drug delivery system. This simple molecule offers high solubility and pH-controlled drug release, enhancing therapeutic potential.

Keywords:
cucurbiturildrug deliveryhost-guest systemsself-assemblysupramolecular chemistry

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Area of Science:

  • Supramolecular Chemistry
  • Materials Science
  • Pharmaceutical Sciences

Background:

  • Current drug delivery systems often increase in complexity with added functionality.
  • A need exists for simpler, yet highly effective, drug delivery platforms.

Purpose of the Study:

  • To synthesize and characterize a novel, multifunctional molecule for advanced drug delivery.
  • To explore the integration of multiple functions into a single, simple molecular design.

Main Methods:

  • Synthesis of hexanoate-cucurbit[7]uril (CB[7]C5 COONa).
  • Evaluation of solubility and binding affinity.
  • Assessment of pH-controlled release capabilities.

Main Results:

  • CB[7]C5 COONa exhibits extremely high solubility (>600 mg/mL).
  • The molecule demonstrates well-defined pH-controlled drug release.
  • High binding affinity of the cucurbit[7]uril cavity is maintained.

Conclusions:

  • The hexanoate modification integrates high solubility and pH-responsive release into cucurbit[7]uril.
  • This strategy simplifies drug delivery systems while enhancing their capabilities.
  • CB[7]C5 COONa offers a promising platform for controlling drug bioactivity.