Results 121 to 130 of about 42,977 (261)
Binap-silver-catalyzed enantioselective multicomponent 1,3-dipolar cycloaddition of azomethines ylides derived from ethyl glyoxylate [PDF]
, 2015 The enantioselective binap–silver catalyzed multicomponent 1,3-dipolar cycloaddition using ethyl glyoxylate, phenylalanine ethyl ester, and maleimides is described. The employment of basic silver carbonate allows the reaction to take place in the absence
Mancebo Aracil, Juan +2 more
core +2 more sources
Molecules, 2017 For the first time, arylmethylidene cyclohexanones that are non-symmetrical due to the presence of peripheral substituents were studied in 1,3-dipolar cycloaddition reactions.
Alexander Anis’kov +3 more
doaj +1 more source
ChemistryOpen, EarlyView.A series of tetrahydrochromene derivatives bearing triazole rings is synthesized via a one‐pot reaction. The process is optimized by ultrasonication of a basic aqueous tert‐butanol mixture. Subsequently, the optimized steps are successfully integrated into a four‐component, one‐pot protocol. The whole process was completed in less than 2 h.
Saeede Azhari +2 more
wiley +1 more source
Synthesis and biological evaluation of phosphonated dihydroisoxazole nucleosides [PDF]
, 2006 Phosphonated isoxazolinyl nucleosides have been prepared via 1,3-dipolar cycloaddition reaction of nitrile oxides with corresponding vinyl or allyl nucleobases for antiviral studies.
Balestrieri, E +8 more
core +1 more source
Reversible Nanocomposites With Carbon Nanotubes as the Diene in the Diels–Alder Reaction
Polymer Composites, EarlyView.Scheme of the reversible nanocomposites through DA and rDA reactions with participation of carbon nanotubes. ABSTRACT Carbon nanotubes (CNTs) often require surface functionalization to facilitate uniform distribution and address issues related to aggregation. Due to the sp2 hybridized carbon atoms on their surface, CNTs readily participate in the Diels–
Jie Guo +3 more
wiley +1 more source
Decarboxylative 1,3-dipolar cycloadditions of
RSC Advancesl-Proline is widely used in 1,3-dipolar cycloaddition reactions. Azomethine ylide derived from decarboxylative condensation of l-proline and 1,2-dicarbonyl compounds can directly react with various dipolarophiles through 1,3-dipolar cycloaddition.
Fatemeh Doraghi +6 more
openaire +2 more sources
Rational Perturbation of the Fluorescence Quantum Yield in Emission‐Tunable and Predictable Fluorophores (Seoul‐Fluors) by a Facile Synthetic Method Involving C—H Activation† [PDF]
, 2015 Fluorescence imaging enables the uniquely sensitive observation of functional‐ and molecular‐recognition events in living cells. However, only a limited range of biological processes have been subjected to imaging because of the lack of a design strategy
Choi, Eun Joung +4 more
core +1 more source
Beilstein Journal of Organic Chemistry, 2011 An efficient synthesis of 1,3-diaryl-4-halo-1H-pyrazoles was achieved. The synthesis involves the [3 + 2] dipolar cycloaddition of 3-arylsydnones and 2-aryl-1,1-dihalo-1-alkenes. The process proceeds smoothly in moderate to excellent yields. 1,3-Diaryl-4-
Yiwen Yang +4 more
doaj +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
New cofactor supports α,β-unsaturated acid decarboxylation via 1,3-dipolar cycloaddition
Nature, 2015 The bacterial ubiD and ubiX or the homologous fungal fdc1 and pad1 genes have been implicated in the non-oxidative reversible decarboxylation of aromatic substrates, and play a pivotal role in bacterial ubiquinone (also known as coenzyme Q) biosynthesis ...
K. Payne +14 more
semanticscholar +1 more source