Related Experiment Video

Updated: Sep 4, 2026

Chemoselective Preparation of 1-Iodoalkynes, 1,2-Diiodoalkenes, and 1,1,2-Triiodoalkenes Based on the Oxidative Iodination of Terminal Alkynes
09:54

Chemoselective Preparation of 1-Iodoalkynes, 1,2-Diiodoalkenes, and 1,1,2-Triiodoalkenes Based on the Oxidative Iodination of Terminal Alkynes

Published on: September 12, 2018

RECENT ADVANCES IN THE SYNTHESIS OF 19-NORSTEROIDS

T B WINDHOLZ, M WINDHOLZ

    Angewandte Chemie (International Ed. in English)
    |May 1, 1964
    PubMed
    Abstract

    No abstract available in PubMed .

    Keywords:
    17-KETOSTEROIDSACETATESANABOLIC STEROIDSCHEMISTRYCHEMISTRY, PHARMACEUTICALESTRONEEXPERIMENTAL LAB STUDYHETEROCYCLIC COMPOUNDSLEADLIGHTOXIMESPROGESTATIONAL HORMONESREVIEWSTEROIDS

    More Related Videos

    A Direct, Regioselective and Atom-Economical Synthesis of 3-Aroyl-N-hydroxy-5-nitroindoles by Cycloaddition of 4-Nitronitrosobenzene with Alkynones07:30

    A Direct, Regioselective and Atom-Economical Synthesis of 3-Aroyl-N-hydroxy-5-nitroindoles by Cycloaddition of 4-Nitronitrosobenzene with Alkynones

    Published on: January 21, 2020

    Metal-free Synthesis of Ynones from Acyl Chlorides and Potassium Alkynyltrifluoroborate Salts09:58

    Metal-free Synthesis of Ynones from Acyl Chlorides and Potassium Alkynyltrifluoroborate Salts

    Published on: February 24, 2015

    Related Concept Videos

    Transducer Mechanism: Nuclear Receptors01:31

    Transducer Mechanism: Nuclear Receptors

    Nuclear receptors, or NRs, are unique transcription factors that regulate gene transcription and affect the cellular pathways involved in reproduction, development, or metabolism. Their ability to be stimulated by small lipophilic ligands and control vital cellular processes makes them ideal drug targets. Nearly 10-15% of currently prescribed drugs target these receptors.
    About 48 different soluble family members of nuclear receptors are identified that can be divided into two main classes:
    Synthesis of α-Substituted Carbonyl Compounds: The Stork Enamine Reaction01:26

    Synthesis of α-Substituted Carbonyl Compounds: The Stork Enamine Reaction

    α-Substituted ketones or aldehydes can be synthesized from enamines by the Stork enamine reaction, named after its pioneer Gilbert Stork. Enamines are useful synthetic intermediates where the lone pair on nitrogen is in conjugation with the C=C bond. They resemble enolate ions, as the resonance forms of both species have a nucleophilic α carbon.
    Drugs Affecting Neurotransmitter Synthesis01:29

    Drugs Affecting Neurotransmitter Synthesis

    Drugs affecting neurotransmitter synthesis can impact the adrenergic neuron and the synthesis of neurotransmitters. For example, α-methyltyrosine and carbidopa target specific enzymes involved in catecholamine synthesis. α-methyltyrosine inhibits the enzyme tyrosine hydroxylase, which converts tyrosine into dopamine. By blocking this enzyme, α-methyltyrosine reduces dopamine production and other catecholamines. Carbidopa, on the other hand, inhibits the enzyme dopa decarboxylase, which converts...
    Adrenergic Agonists: Chemistry and Structure-Activity Relationship01:16

    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...
    Other Nuclides: 31P, 19F, 15N NMR01:16

    Other Nuclides: 31P, 19F, 15N NMR

    Many organic, inorganic, and biological molecules contain spin-half nuclei such as nitrogen-15, fluorine-19, and phosphorus-31. As a result, NMR studies of these nuclei have found extensive applications in chemical and biological research.
    While fluorine-19 and phosphorous-31 have high natural abundances (100%) and positive gyromagnetic ratios, nitrogen-15 has a low natural abundance and a negative gyromagnetic ratio. However, nitrogen-15 is still preferred over nitrogen-14 (which has a high...
    Preparation of 1° Amines: Hofmann and Curtius Rearrangement Overview01:07

    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.