Results 71 to 80 of about 18,239,073 (189)

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  

Studies on Heterocyclic Compounds. XIV. 1, 3-Dipolar Cycloaddition Reaction of Dimethyl Acetylenedicarboxylate with Phenylhydrazones

Chemical and Pharmaceutical Bulletin, 1973
1, 3-Dipolar cycloaddition of aldehyde hydrazones with dimethyl acetylenedicarboxylate without solvent gives rise to dimethyl 1, 3-diphenylpyrazole-4, 5-dicarboxylate, and in some cases trimethyl 1-phenylpyrazole-3, 4, 5-tricarboxylate as a by-product.
OGURA, HARUO, KUBO, KAZUO, WATANABE, YUMIKO, ITOH, TSUNEO   +3 more
openaire   +2 more sources

Synthesis and Biological Evaluation of Well‐Defined M6P(n)‐Modified Glycopeptides for Targeted Protein Degradation

Chemistry – A European Journal, Volume 32, Issue 33, 1 September 2026.
A synthetic methodology has been developed to prepare multifunctional M6P and M6Pn ligands of different valency. The glycopeptides were conjugated to cetuximab and then examined to mediate cellular uptake of fluorescently labeled EGFRvIII. Only cetuximab modified by glycopeptides having 3 or 6 M6P or M6Pn residues demonstrated greater uptake.
Patrycja Lenartowicz, Jan‐Willem H. Langenbach, Nataliia Voloshyna, David Aidukas, Arwin J. Brouwer, John A. W. Kruijtzer, Geert‐Jan Boons   +6 more
wiley   +1 more source

Cyclic Thiosulfinates: Synthesis and Applications in Chemical Biology and Materials Science

ChemBioChem, Volume 27, Issue 16, 27 August 2026.
Cyclic thiosulfinates (CTs) are strained organosulfur heterocyclic compounds with a polarized ─S(═O)─S─ bond that enables selective thiol reactivity. Advances in synthesis afford tunable scaffolds that support efficient proximal thiol cross‐linking and enable applications in chemical biology and materials science. Cyclic thiosulfinates (CTs) constitute
Benjamin Liebson, Jeffrey N. Agar, Roman Manetsch, Prakash T. Parvatkar   +3 more
wiley   +1 more source

Copper on Calcium Carbonate and Marble Waste as Recyclable Catalysts for Ultrasound‐Assisted One‐Pot Synthesis of 1,4‐Disubstituted 1,2,3‐Triazoles

ChemSusChem, Volume 19, Issue 16, 27 August 2026.
A sustainable CaCO3‐supported copper catalyst, prepared by simple adsorption of Cu(II) onto natural and marble waste‐derived carbonate materials, promotes ultrasound‐assisted CuAAC reaction in water. The work provides straightforward access to 1,4‐disubstituted 1,2,3‐triazoles under mild conditions while combining catalyst recyclability with the ...
Riccardo Serra, Dipak J. Fartade, Pietro Caboni, Cristina Carucci, Andrea Salis, Enrica Tuveri, Antonella Rossi, Andrea Citarella, Andrea Porcheddu   +8 more
wiley   +1 more source

Síntese regiosseletiva de cristais líquidos contendo o heterociclo isoxazol [PDF]

, 2008
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas. Programa de Pós-Graduação em QuímicaMoléculas com características líquido-cristalinas têm ultimamente atraído um grande interesse por parte de ...
Bryk, Fernando Rebouças
core  

Retro‐Hetero‐Michael Addition Strategies in Organic Synthesis

European Journal of Organic Chemistry, Volume 29, Issue 32, 24 August 2026.
In this review, synthetic approaches to carbo‐ and heterocyclic compounds, including natural products, published in the last 15 years (2011–2025) which have either relied upon or included a retro‐hetero‐Michael addition step at any stage are discussed.
Dina Scarpi, Ernesto G. Occhiato
wiley   +1 more source

Transition metal complexation in 1,3-dipolar cycloadditions

, 2003
Transition metal complexation of organic molecules is becoming common in the field of 1,3-dipolar cycloadditions as a successful methodology to increase reactivities and to control selectivities. The literature data on this subject are here reviewed in a
G. Broggini, G. Molteni, A. Terraneo, G. Zecchi   +3 more
core   +2 more sources

Isotelluroureas for Asymmetric C1 Ammonium Enolate Reactions

European Journal of Organic Chemistry, Volume 29, Issue 31, 19 August 2026.
Chiral isotelluroureas are powerful catalysts for a variety of C─C bond forming C1 ammonium enolate transformations. Isotelluroureas (ITeUs) have recently been introduced as a novel class of highly nucleophilic Lewis base catalysts. Herein, we systematically screened them for their potential to facilitate C1 ammonium enolate transformations and ...
Fereshteh Khorasani, Lotte Stockhammer, Magdalena Piringer, Mario Waser   +3 more
wiley   +1 more source

Asymmetric 1,3-Dipolar Cycloadditions of Cyclic Stabilized Ylides Derived from Chiral 1,2-Amino Alcohols

, 2006
International audienceThe use of structurally similar chiral non-racemic azomethine ylides, nitrones and azomethine imines derived from 1,2-aminol alcohols in asymmetric dipolar cycloadditions is reviewed.
Chauveau, Ariane, Bonin, Martine, Micouin, Laurent   +2 more
core   +1 more source