Results 41 to 50 of about 272,115 (235)

Reactive & Efficient: Organic Azides as Cross-Linkers in Material Sciences

open access: yesMolecules, 2020
The exceptional reactivity of the azide group makes organic azides a highly versatile family of compounds in chemistry and the material sciences. One of the most prominent reactions employing organic azides is the regioselective copper(I)-catalyzed ...
Marvin Schock, Stefan Bräse
doaj   +1 more source

SmI<sub>2</sub>-Catalyzed Coupling of Alkyl Housane Ketones and Alkenes in an Approach to Norbornanes. [PDF]

open access: yesAngew Chem Int Ed Engl
Samarium diiodide (Sml2) is an effective catalyst for the mild, atom‐economical coupling of bicyclo[2.1.0]pentane, or housane, ketones, and electron‐deficient alkenes to give functionalized norbornane structural motifs not easily accessible by classical cycloaddition approaches.
Roy D   +7 more
europepmc   +2 more sources

Mechanochemical reactions studied by in situ Raman spectroscopy : base catalysis in liquid-assisted grinding [PDF]

open access: yes, 2015
In situ Raman spectroscopy was employed to study the course of a mechanochemical nucleophilic substitution on a carbonyl group.
Biliškov, Nikola   +8 more
core   +1 more source

Triazolinediones as highly enabling synthetic tools [PDF]

open access: yes, 2016
Triazolinediones (TADs) are unique reagents in organic synthesis that have also found wide applications in different research disciplines, in spite of their somewhat "exotic" reputation.
Billiet, Stijn   +5 more
core   +1 more source

A short synthesis of (±)-cherylline dimethyl ether

open access: yesBeilstein Journal of Organic Chemistry, 2009
A synthesis of (±)-cherylline dimethyl ether is reported. The key steps involved are Michael-type addition, radical azidonation of an aldehyde, Curtius rearrangement, and reduction of an isocyanate intermediate followed by Pictet–Spengler cyclization.
Bhima Y. Kale   +7 more
doaj   +1 more source

Synthesis of N-Z, N′-Formyl α-Amino Acid Derived Gem-Diamines [PDF]

open access: yes, 2008
A variety of N-carbobenzoxy, N′-formyl gem-diaminoalkyl derivatives have been obtained through Goldsmith-Wick reaction of Z-α-amino acid/peptide acid derived isocyanates with 96% HCOOH in presence of 4-dimethylaminopyridine (DMAP) as catalyst.
Narendra, N., Sureshbabu, V.V.
core   +2 more sources

Convenient Synthesis and Antimicrobial Activity of Some Novel Amino Acid Coupled Triazoles

open access: yesMolecules, 2010
This study describes a promising one-pot synthesis of [2-(5-benzyl-4-phenyl-4H-[1,2,4]triazol-3-thio)-acetyl]-amino acid methyl esters 6a-h and dipeptides 10a-e, which were successfully synthesized starting from amino acid esters 5a-h, 9a-e and azides 4,
S. M. El Rayes
doaj   +1 more source

Some Applications of the Curtius Rearrangement

open access: yesJournal of the Chemical Society, Perkin Transactions 1, 1983
Pairs of optically pure enantiomers of substituted 1,1 -diamines have been prepared from the azides of L-amino-acids via the Curtius rearrangement.This synthesis is based on the interchange of two groups attached to the asymmetrically substituted tetrahedral α-carbon atom of the parent amino acid.
Moutevelis-Minakakis, P., Photaki, I.
openaire   +2 more sources

T3P® (propylphosphonic anhydride) Mediated Conversion of Carboxylic Acids into Acid Azides and one-pot Synthesis of Ureidopeptides [PDF]

open access: yes, 2010
A general, mild, efficient, and environmentally benign protocol, which makes use of T3P® as an acid activating agent for the direct synthesis of acid azides from carboxylic acids is described.
Basavaprabhu, .   +3 more
core   +1 more source

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