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Nomenclature of Primary Amines

Nomenclature of Primary Amines

Primary, secondary, and tertiary amines are compounds consisting of one, two, and three alkyl groups connected to the amino group (–NH2), respectively. As depicted in Figure 1, the common name of the primary amines is obtained by adding the suffix -amine to the alkyl substituent attached to the amino group as the corresponding alkylamine.

Nomenclature of Aryl and Heterocyclic Amines

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.

Nomenclature of Carboxylic Acid Derivatives: Amides and Nitriles

Nomenclature of Carboxylic Acid Derivatives: Amides and Nitriles

Naming Amides
The IUPAC and common names of amides are derived from the parent carboxylic acid, by replacing the suffix “oic acid” and “ic acid,” respectively, with “amide.” In the following example, the IUPAC name ethanamide is derived from ethanoic acid, and the common name, acetamide, is obtained from acetic acid.

Carboxylic Acids to Methylesters: Alkylation using Diazomethane

Carboxylic Acids to Methylesters: Alkylation using Diazomethane

Carboxylic acids react with diazomethane in an ether solvent via alkylation at the carboxylate oxygen atom to give methyl esters of the corresponding acid with excellent yields.

Adrenergic Agonists: Chemistry and Structure-Activity Relationship

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...

Diazonium Group Substitution: –OH and –H

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.

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(7-Dimethylamino-1-hydroxy-3-naphthyl)(morpholino)methanone.

Moon-Hwan Kim, Ji-Su Seo, Chong-Hyeak Kim

Acta Crystallographica. Section E, Structure Reports Online

|May 18, 2011

Summary

The crystal structure of C(17)H(20)N(2)O(3) reveals a distorted morpholine ring. Intermolecular hydrogen bonds and C-H⋯π interactions stabilize the crystal lattice.

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Area of Science:

Crystallography
Organic Chemistry
Molecular interactions

Background:

Understanding the three-dimensional arrangement of atoms in organic molecules is crucial.
Crystal structure analysis provides detailed insights into molecular conformation and intermolecular forces.
The compound C(17)H(20)N(2)O(3) belongs to a class of molecules with potential pharmaceutical relevance.

Purpose of the Study:

To determine the precise crystal structure of the title compound, C(17)H(20)N(2)O(3).
To identify and characterize the intermolecular interactions responsible for crystal lattice stabilization.
To elucidate the conformational preferences of the morpholine ring within the crystal.

Main Methods:

Single-crystal X-ray diffraction was employed to collect diffraction data.
The crystal structure was solved and refined using standard crystallographic software.
Analysis of the refined structure identified hydrogen bonding and other non-covalent interactions.

Main Results:

The title compound, C(17)H(20)N(2)O(3), crystallizes in a specific space group.
The morpholine ring adopts a slightly distorted chair conformation.
A significant intermolecular O-H⋯O hydrogen bond was observed between hydroxyl and carbonyl groups.
Weak intermolecular C-H⋯π interactions were also detected.

Conclusions:

The crystal structure of C(17)H(20)N(2)O(3) has been fully characterized.
Intermolecular hydrogen bonding plays a key role in stabilizing the crystal packing.
The conformational analysis of the morpholine ring provides valuable data for structure-activity relationship studies.