Results 51 to 60 of about 7,931 (260)
Beilstein Journal of Organic Chemistry, 2008 Oxazolo[5,4-d]pyrimidines can be considered as 9-oxa-purine analogs of naturally occurring nucleic acid bases. Interest in this ring system has increased due to recent reports of biologically active derivatives.
Subrata Mandal +4 more
doaj +1 more source
Applications of Azide-Based Bioorthogonal Click Chemistry in Glycobiology
Molecules, 2013 Click chemistry is a powerful chemical reaction with excellent bioorthogonality features: biocompatible, rapid and highly specific in biological environments.
Xiu Zhang, Yan Zhang
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One-pot Microwave-Assisted Synthesis of 1H-Phenanthro[9,10- d][1,2,3]triazole
Molbank, 2008 In this study, a fast and good yield one-pot microwave-assisted synthesis (45 seconds) of 1H-phenanthro[9,10-d][1,2,3]triazole by a 1,3-dipolar cycloaddition reaction of sodium azide and 9-bromophenanthrene in the presence of potassium tert-butoxide in ...
Mehrak Faraji, Avat Arman Taherpour
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Azaporphyrinoid‐Based Photo‐ and Electroactive Architectures for Advanced Functional Materials
Advanced Materials, EarlyView.A long‐standing collaboration between the Torres and Guldi groups has yielded diverse azaporphyrinoid‐based donor‐acceptor nanohybrids with promising applications in solar energy conversion. This conspectus highlights key molecular platforms and structure‐function relationships that govern light and charge management, supporting the rational design of ...
Jorge Labella +3 more
wiley +1 more source
Molecules, 2014 Diastereoselective reactions between 4-formylpyrazoles, N-substituted maleimides and glycine derivates led to new series of pyrazolyldipyrrolo [3,4-a:3',4'-f]pyrrolizines and pyrazolylpyrrolo[3,4-c]pyrroles in good yields.
Jairo Quiroga +6 more
doaj +1 more source
Synthesis of Chromen[4,3-b]pyrrolidines by Intramolecular 1,3-Dipolar Cycloadditions of Azomethine Ylides: An Experimental and Computational Assessment of the Origin of Stereocontrol [PDF]
, 2015 Azomethine ylides, generated from imine-derived O-cinnamyl or O-crotonyl salicylaldeyde and α-amino acids, undergo intramolecular 1,3-dipolar cycloaddition, leading to chromene[4,3-b]pyrrolidines.
Arrieta, Ana +8 more
core +2 more sources
Synthesis of novel phosphorylated chrysin derivatives by 1, 3-dipolar cycloaddition reaction
Phosphorus, Sulfur, and Silicon and the Related Elements, 2016 Through 1,3-dipolar cycloaddition reaction, 1,4,5-trisubstituted-1,2,3-triazole and phosphate-containing chrysin derivatives were synthesized with high yields. The target compounds were characterized by 1H, 31P, 13C NMR spectroscopy and HRMS.
Shaohua Zhu +5 more
openaire +1 more source
Advanced Science, EarlyView.ABSTRACT Orthogonal translation systems (OTSs) enable site‐specific incorporation of non‐canonical amino acids (ncAAs) and are central to genetic code expansion. Current engineering strategies typically rely on hyperstable aminoacyl tRNA synthetase (aaRS) scaffolds to tolerate destabilizing mutations required for substrate diversification.
Nikolaj G. Koch +4 more
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
Hydrazones as Singular Reagents in Asymmetric Organocatalysis [PDF]
, 2016 This Minireview summarizes strategies and developments regarding the use of hydrazones as reagents in asymmetric organocatalysis, their distinct roles in nucleophile–electrophile, cycloaddition, and cyclization reactions.
Fernández Fernández, Rosario Fátima +4 more
core +1 more source