Related Experiment Video
Updated: Jun 1, 2026

07:56
Preparation of 6-aminocyclohepta-2,4-dien-1-one Derivatives via Tricarbonyl(tropone)iron
Published on: August 12, 2019
1,3,5-Triaza-adamantan-7-amine
Summary
The first structurally characterized triaza-adamantane molecule was synthesized. Its crystal structure reveals weak hydrogen bonds forming molecular columns, offering insights into novel cage compounds.
Area of Science:
- Organic Chemistry
- Crystal Engineering
- Supramolecular Chemistry
Background:
- Adamantane derivatives are important in materials science and medicinal chemistry.
- Triaza-adamantanes are a class of nitrogen-containing cage compounds with potential applications.
- Structural characterization of novel cage compounds is crucial for understanding their properties.
Purpose of the Study:
- To synthesize and structurally characterize the first isolated triaza-adamantane.
- To investigate the intermolecular interactions in the crystal lattice of triaza-adamantane.
- To provide a foundation for the development of new nitrogen-rich cage compounds.
Main Methods:
- Chemical synthesis of the title compound C(7)H(14)N(4).
- Single-crystal X-ray diffraction analysis to determine the molecular and crystal structure.
- Analysis of intermolecular interactions, including hydrogen bonding.
Main Results:
- The first structurally characterized, isolated triaza-adamantane (C(7)H(14)N(4)) was obtained.
- The crystal structure shows molecules arranged in columns along the crystallographic fourfold axis.
- Weak intermolecular N-H⋯N hydrogen bonds were identified as the linking forces.
Conclusions:
- The successful synthesis and characterization of triaza-adamantane open new avenues in cage compound chemistry.
- The observed hydrogen bonding pattern provides insights into the self-assembly of nitrogen-rich molecules.
- This work establishes a precedent for the study of related polyaza-adamantane derivatives.
Related Concept Videos
Preparation of 1° Amines: Hofmann and Curtius Rearrangement Overview
In the presence of an aqueous base and a halogen, primary amides can lose the carbonyl (as carbon dioxide) and undergo rearrangement to form primary amines. This reaction, called the Hofmann rearrangement, can produce primary amines (aryl and alkyl) in high yields without contamination by secondary and tertiary amines.
Adrenergic Agonists: Chemistry and Structure-Activity Relationship
Adrenergic agonists' structure-activity relationship (SAR) determines their selectivity and efficacy. These agonists comprise a phenylethylamine moiety with an aromatic ring and an ethylamine side chain.
Aromatic ring substitutions: Substituting the aromatic ring with –OH groups at positions 3 and 4 yields catecholamines (e.g., epinephrine), which have a high affinity for adrenoceptors. Hydrogen bonding between –OH groups and receptors enhances adrenergic activity.
Separation of the aromatic...
Aromatic ring substitutions: Substituting the aromatic ring with –OH groups at positions 3 and 4 yields catecholamines (e.g., epinephrine), which have a high affinity for adrenoceptors. Hydrogen bonding between –OH groups and receptors enhances adrenergic activity.
Separation of the aromatic...
Adrenergic Agonists: Indirect-Acting Agents
Indirect-acting adrenergic agonists potentiate the effects of endogenous catecholamines through different mechanisms without directly binding to adrenoceptors.
One mechanism involves depleting stored catecholamines by displacing them from synaptic vesicles. These agents, known as "displacers," are transported into vesicles at the expense of noradrenaline. Examples include amphetamine and tyramine, which lack a catechol moiety, resulting in prolonged action, improved oral bioavailability, and...
One mechanism involves depleting stored catecholamines by displacing them from synaptic vesicles. These agents, known as "displacers," are transported into vesicles at the expense of noradrenaline. Examples include amphetamine and tyramine, which lack a catechol moiety, resulting in prolonged action, improved oral bioavailability, and...
Nomenclature of Aryl and Heterocyclic Amines
The simplest aromatic amine is phenylamine, which contains an –NH2 functionality directly attached to an aromatic ring. The name aniline is designated for this skeleton. As shown in Figure 1, the common names of the functionalized anilines involve prefixes ortho-, meta-, and para- to indicate the substitution position. Different functionalized aniline derivatives also have notable trivial names.
Diazonium Group Substitution: –OH and –H
Nitrous acid, a weak acid, is prepared in situ via the reaction of sodium nitrite with a strong acid under cold conditions. This nitrous acid prepared in situ reacts with primary arylamines to form arenediazonium salts. Such reactions are known as diazotization reactions. As shown in Figure 1, the formation of arenediazonium salts begins with the decomposition of nitrous acid in an acidic solution to give nitrosonium ions.
Preparation of 1° Amines: Gabriel Synthesis
Direct alkylation is not a suitable method for synthesizing amines because it produces polyalkylated products. Gabriel synthesis is the most preferred method to exclusively make primary amines. The method uses phthalimide, which contains a protected form of nitrogen that participates in alkylation only once to predominantly give primary amines.
Strong bases like NaOH or KOH deprotonate the phthalimide to form the corresponding anion, which acts as a nucleophile. Further, the anion attacks an...
Strong bases like NaOH or KOH deprotonate the phthalimide to form the corresponding anion, which acts as a nucleophile. Further, the anion attacks an...

