Related Experiment Video
Updated: Sep 30, 2026

Preparation of Enantiopure Non-Activated Aziridines and Synthesis of Biemamide B, D, and epiallo-Isomuscarine
Published on: June 13, 2022
[Structure and activity relationship of propafenone and alkylesters of 2-and
1Katedra farmaceutickej chémie Farmaceutickej fakulty Univerzity Komenského, Bratislava. garaju@fpharm.uniba.sk
Abstract:
Conformation analysis was performed in propaphenone and two potential antiarrhythmic agents of the carbamate type, employing the method of molecular mechanics for calculations. Energetically stable conformers were optimized by means of the quantumchemical method AM1 and the optimized structures were used to construct the pharmacophore. Using the programme Chem-X, four groups of stable conformations of these drug were found, and comparisons by means of the molecular graphic method were employed to graphically visualize the degree of their similarity and to determine the interatomic distances of the groups with free electron pairs and a lipophilic aromatic nucleus.
Related Concept Videos
Adrenergic Agonists: Chemistry and Structure-Activity Relationship
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...
Structures of Carboxylic Acid Derivatives
Carboxylic acid derivatives contain an acyl group attached to a heteroatom such as chlorine, oxygen, or nitrogen. The carbonyl carbon and oxygen are both sp2-hybridized with an unhybridized p orbital.
The three sp2 orbitals of the carbonyl carbon form three σ bonds, one each with the carbonyl oxygen, the α carbon, and the heteroatom, whereas the other two sp2 orbitals of the carbonyl oxygen are occupied by the lone pairs. Further, the unhybridized p...
Local Anesthetics: Chemistry and Structure-Activity Relationship
Indirect-Acting Cholinergic Agonists: Chemistry and Structure-Activity Relationship
Reversible inhibitors display short to medium durations of action. Short-acting agents include simple alcohols with...
Alkylation of β-Ketoester Enolates: Acetoacetic Ester Synthesis
Structure and Nomenclature of Alcohols and Phenols
Alcohols are one of the most important functional groups in organic chemistry. The name of alcohol comes from the hydrocarbon from which it is derived. Alcohols are organic molecules containing the functional hydroxyl or –OH group directly bonded to carbon. Phenols have an OH group directly attached to a benzene ring. While alcohols are colorless, phenol is a white crystalline compound with a characteristic "hospital smell" odor.
As with other organic compounds, alcohols and phenols...

