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Sedatives and Hypnotics Drugs: Benzodiazepines

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Benzodiazepines have both sedative and hypnotic properties. They include compounds such as diazepam (Valium) and alprazolam (Xanax). Structurally, their cores are similar, consisting of the fusion of a benzene ring and a diazepine ring, but they share a common mechanism of action in the central nervous system (CNS).
Benzodiazepines work by enhancing the effects of the inhibitory neurotransmitter GABA. They bind to the GABAA receptor, increasing its affinity for GABA, which opens chloride...

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Benzodiazepines are a class of anxiolytic drugs known for their rapid efficacy and high therapeutic-to-lethal dose ratio, but with a potential risk of drug dependence. These drugs are lipophilic, allowing for rapid absorption after oral administration, eventually reaching the central nervous system (CNS). Once in the CNS, benzodiazepines bind to the allosteric site of the GABAA receptor. This binding enhances the inhibitory effects of the neurotransmitter GABA. By doing so, they prevent...

CNS Depressants: Barbiturates and Benzodiazepines

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CNS depressants include drugs from the category of barbiturates and benzodiazepines. They are valuable medications for managing anxiety disorders and insomnia. Barbiturates, once used to induce and maintain sleep, have been replaced mainly by benzodiazepines due to barbiturate's toxicity, tolerance, and overdose risks. They interact with GABAA receptors, leading to sedation at low doses and potentially coma and death at higher doses. Phenobarbital, a long-acting barbiturate, possesses...

Diazonium Group Substitution: –OH and –H

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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.

Diazonium Group Substitution with Halogens and Cyanide: Sandmeyer and Schiemann Reactions

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Arenediazonium substitution reactions occur when the diazonium group is substituted by various functional groups such as halides, hydroxyl, nitrile, etc. For instance, arenediazonium salts react with copper(I) salts of chloride, bromide, or cyanide to form corresponding aryl chlorides, bromides, and nitriles. These reactions are named Sandmeyer reactions. Although the mechanism of this reaction is complicated, as illustrated in Figure 1, they are believed to progress via an aryl copper...

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When more than one substituent is present on the benzene ring, the IUPAC nomenclature depends on the number of substituents present.
For disubstituted benzene derivatives, with two groups attached to the benzene ring, three constitutional isomers are possible. For example, consider dimethyl benzene, often called xylene, where the second methyl group can be substituted at the second, third, or fourth carbon. The relative position of the substituents is represented by prefixes ortho, meta, or...

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Related Experiment Video

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Continuous Flow Chemistry: Reaction of Diphenyldiazomethane with p-Nitrobenzoic Acid

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Published on: November 15, 2017

1-Benzyl-1,4-diazepan-5-one.

Fei Sha, Hao Xu, Shan Liu

Acta Crystallographica. Section E, Structure Reports Online

|January 5, 2011

Summary

This study details a diazepane intermediate, C(12)H(16)N(2)O, a potential inhibitor of human nitric oxide synthesis. Its molecular structure features a chair-like seven-membered ring and intermolecular hydrogen bonds forming sheets.

Area of Science:

Medicinal Chemistry
Organic Chemistry
Structural Biology

Background:

Nitric oxide (NO) plays crucial roles in various physiological processes.
Dysregulation of NO synthesis is implicated in numerous diseases.
Developing selective NO synthesis inhibitors is a key therapeutic strategy.

Purpose of the Study:

To characterize a novel diazepane intermediate with potential as a human nitric oxide synthesis inhibitor.
To elucidate the molecular structure and intermolecular interactions of the compound.

Main Methods:

X-ray crystallography was employed to determine the three-dimensional structure.
Analysis of bond angles, torsion angles, and intermolecular interactions (hydrogen bonding).

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Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides (CHIPS)

Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides (CHIPS)

Published on: June 20, 2014

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Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides (CHIPS)

Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides (CHIPS)

Published on: June 20, 2014

Main Results:

The compound C(12)H(16)N(2)O was identified as a diazepane intermediate.
The molecule exhibits a chair-like conformation in its seven-membered ring.
Intermolecular N-H⋯O hydrogen bonds form dimers, and C-H⋯O interactions create infinite sheets.

Conclusions:

The characterized diazepane intermediate possesses a distinct molecular architecture.
The structural features suggest potential for modulating human nitric oxide synthesis.
Further investigation is warranted to explore its therapeutic applications as an NO inhibitor.