Related Experiment Video
Updated: Oct 13, 2025

Experimental Protocol for Biodiesel Production with Isolation of Alkenones as Coproducts from Commercial Isochrysis Algal Biomass
Published on: June 24, 2016
Alkaloids and Selected Topics in Their Thermochemistry.
Maja Ponikvar-Svet1, Diana N Zeiger2, Joel F Liebman2
1Department of Inorganic Chemistry and Technology, Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia.
This study explores the thermochemical properties of biologically active alkaloids, focusing on demethoxylation enthalpies in the condensed phase. Understanding these properties is crucial for alkaloid chemistry and drug development.
Area of Science:
- Chemistry
- Biochemistry
- Physical Chemistry
Background:
- Alkaloid chemistry is diverse and intricate.
- Many alkaloids exhibit significant physiological activity, making them targets of interest.
- There is a notable lack of knowledge regarding the thermochemistry of alkaloids, particularly in the gas phase.
Purpose of the Study:
- To investigate the thermochemical characteristics of biologically relevant alkaloids.
- To determine demethoxylation enthalpies in the condensed phase.
- To provide a foundation for understanding alkaloid stability and reactivity.
Main Methods:
- Focus on demethoxylation enthalpies, distinct from trans-methoxylation reactions.
- Experimental investigation of selected biologically relevant alkaloids.
- Analysis of condensed phase thermochemical data.
Main Results:
- Quantification of demethoxylation enthalpies for a series of alkaloids.
- Establishment of thermochemical profiles for these compounds.
- Data provides insights into the energetic aspects of alkaloid structures.
Conclusions:
- The study provides essential thermochemical data for understanding alkaloid behavior.
- Findings contribute to the broader field of alkaloid chemistry.
- This research lays the groundwork for future investigations into alkaloid energetics and applications.
Related Concept Videos
Physical Properties of Amines
Antidotes
Specific antidotes operate by inhibiting the enzymes that control biochemical pathways, reducing the production of harmful metabolites.
An example of an antidote is atropine, which counteracts the detrimental effects of cholinesterase inhibitors. It achieves this by deactivating muscarinic receptors,...
Preparation of Amines: Alkylation of Ammonia and Amines
Each alkylation step makes the nitrogen center more nucleophilic, which triggers successive alkylations until a quaternary ammonium salt is formed. Considering...
Amines: Introduction
Thermal and Photochemical Electrocyclic Reactions: Overview
Phase I Reactions: Oxidation of Carbon-Heteroatom and Miscellaneous Systems
In carbon-nitrogen systems, aliphatic and aromatic amines can undergo oxidative reactions. Secondary and tertiary amines, like those found in tricyclic antidepressants, can undergo N-dealkylation, a process that involves the oxidation of the alkyl group. In addition, oxidative...

