Results 61 to 70 of about 4,239 (193)
Síntese regiosseletiva de cristais líquidos quirais contendo o heterociclo [1,2,3]-triazol [PDF]
, 2005 Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas. Programa de Pós-Graduação em QuímicaO presente trabalho descreve a síntese de compostos quirais derivados do (S)-(-)-2-metil-1-butanol, contendo o ...
Conte, Gilmar
core
European Journal of Organic Chemistry, Volume 29, Issue 22, 9 June 2026.Glycomimetics with triazoline and aziridine groups were synthesised via diastereoselective Huisgen cycloaddition from glycosyl azides. Density functional theory was applied to define the mechanism for BF3 promoted aziridine formation. Triazoline and aziridine derivatives were synthesised by diastereo‐ and regioselective Huisgen cycloaddition of 2,3,4,6‐
Aaron McCormack +4 more
wiley +1 more source
1,3-Dipolar Cycloadditions of N-Benzyl Furfuryl Nitrones with Electron-rich Alkenes
Molecules, 2000 The 1,3-dipolar cycloaddition reaction of N-benzyl-C-(2-furyl)nitrones with electron-rich alkenes gives preferentially trans-substituted 3,5-disubstituted isoxazolidines (endo approach).
Tomas Tejero +3 more
doaj +1 more source
Electrophilic Iodination of Heterocyclic Compounds. Recent Advances 2008–2025: Part II
European Journal of Organic Chemistry, Volume 29, Issue 22, 9 June 2026.Electrophilic iodination using molecular iodine and iodide sources represents an efficient approach for accessing valuable iodinated organic compounds. This review highlights recent advances in the iodination of heterocyclic compounds from 2008 to 2025, emphasizing the role of heteroaryl iodides as important synthetic intermediates for biologically ...
Njomza Ajvazi, Stojan Stavber
wiley +1 more source
1,3-Dipolar cycloadditions of 2-thio-3-chloroacrylamides with diazoalkanes
, 2010 2-Thio-3-chloroacrylamides undergo 1,3-dipolar cycloadditions with diazoalkanes leading to a series of novel pyrazolines and pyrazoles. The mechanistic and synthetic features of the cycloadditions to the 2-thio-3-chloroacrylamides at both the sulfide and
Lawrence, Simon E. +2 more
core +1 more source
ChemistryEurope, Volume 4, Issue 6, June 2026.Polycyclic intermediates enable stereocontrolled synthesis of densely functionalized cis‐1,3‐diamine and amino alcohol carbocycles and heterocycles via structural‐to‐functional complexity transformations from low‐complexity starting material. Cis‐1,3‐functionalized carbocycles and saturated heterocycles are ubiquitous motifs in natural products ...
Jiayi Zhu +2 more
wiley +1 more source
Beilstein Journal of Organic Chemistry, 2017 Trimethylsilyldiazomethane (TMS-CHN2) reacts readily with hetaryl thioketones to give sterically crowded 2-trimethylsilyl-4,4,5,5-tetrahetaryl-1,3-dithiolanes with complete regioselectivity at −75 °C as well as at rt.
Grzegorz Mlostoń +3 more
doaj +1 more source
Journal of Physical Organic Chemistry, Volume 39, Issue 6, June 2026.The dithiirane–thiosulfine equilibrium has been revisited by means of modern computational chemistry tools to shed light on whether stable thiosulfines might be isolated. ABSTRACT Thiosulfines as reactive S‐centered 1,3‐dipoles undergoing (3 + 2)‐cycloadditions are still of interest in the chemistry of sulfur‐rich heterocycles.
Dirk Buddensiek, Thomas Behrens
wiley +1 more source
CHIMIA, 1992 Adducts obtained by 1,3-dipolar cycloadditions to 2,3-dihydroisothiazol-3-one 1,1-dioxides are inclined to undergo a cheletropic process, by which the newly formed heterocyclic part undergoes aromatization, while SO2 is extruded and an ...
Kaspar F. Burri
doaj +2 more sources
ChemistryOpen, 2020 1,2,4‐Oxadiazole[4,5‐a]piridinium salts add alcohols and alkoxides to undergo electrocyclic ring opening affording alkoxybutadienyl 1,2,4‐oxadiazole derivatives.
Dr. Mattia Moiola +2 more
doaj +1 more source