Results 101 to 110 of about 27,871 (287)

Defect-engineered graphene functionalization via cycloaddition reaction – towards a versatile platform for nanoscale devices and 3D heterostructures [PDF]

, 2022
In recent years it has been shown that the outstanding properties of graphene, a direct consequence of its unique 2D structure, could be further tailored by surface functionalization with suitable materials, towards a fine tuning of the system's physical
BASTA, Luca
core  

Organic Transformations Utilizing 1,5,7‐Triazabicyclo[4.4.0]Dec‐5‐Ene (TBD): A Tale of Two Nitrogens

European Journal of Organic Chemistry, Volume 28, Issue 12, March 24, 2025.
1,5,7‐Triazabicyclo[4.4.0]dec‐5‐ene (TBD) is a bicyclic guanidine that has drawn considerable attention in organic synthesis. Its multifunctionality and versatility makes it an ideal reagent to promote various reactions. This review provides a concise guide to recent developments and organic transformations utilizing TBD, classified by the primary ...
Chunling Blue Lan, Karine Auclair
wiley   +1 more source

2‐Aminoindoles and 2‐Iminoindolines as Viable Precursors of Indole‐Fused Nitrogenated Polyheterocycles

Advanced Synthesis &Catalysis, Volume 367, Issue 6, March 18, 2025.
Abstract The synthesis of architecturally complex polyheterocyclic structures embedding the indole ring represents a growing field of interest. Carbolines and their partially dehydro derivatives, pyrazinoindoles, indoloindoles, azepinoindoles and other medium‐sized derivatives are only some examples of indole‐containing polycyclic compounds featured by
Alessandro Palmieri, Marino Petrini
wiley   +1 more source

Cytotoxic activity and apoptosis-inducing potential of di-spiropyrrolidino and di-spiropyrrolizidino oxindole andrographolide derivatives. [PDF]

PLoS ONE, 2013
Anticancer role of andrographolide is well documented. To find novel potent derivatives with improved cytotoxicity than andrographolide on cancer cells, two series of di-spiropyrrolidino- and di-spiropyrrolizidino oxindole andrographolide derivatives ...
Sumit Kumar Dey, Dipayan Bose, Abhijit Hazra, Subhendu Naskar, Abhishek Nandy, Rudra Narayan Munda, Subhadip Das, Nabanita Chatterjee, Nirup Bikash Mondal, Sukdeb Banerjee, Krishna Das Saha   +10 more
doaj   +1 more source

1,3-Dipolar Cycloaddition Reactions of Azomethine Ylides with Carbonyl Dipolarophiles Yielding Oxazolidine Derivatives

Molecules, 2016
We provide a comprehensive account of the 1,3-dipolar cycloaddition reactions of azomethine ylides with carbonyl dipolarophiles. Many different azomethine ylides have been studied, including stabilized and non-stabilized ylides.
Adam G. Meyer, John H. Ryan
doaj   +1 more source

Double Strain‐Release (3+3)‐Cycloaddition: Lewis Acid Catalyzed Reaction of Bicyclobutane Carboxylates and Aziridines

Chemistry – A European Journal, Volume 31, Issue 9, February 12, 2025.
We report a Sc(OTf)3‐catalyzed cycloaddition of highly strained bicyclo[1.1.0]butane carboxylates with protected aziridines. In this transformation, highly functionalized 2‐azabiyclo[3.1.1]heptanes are accessed in single step under mild conditions. This is an example of strain‐release driven transformation, where two highly strained rings combine to ...
Malini George, Jasper Mindner, Silas Wittmer, Daniil A. Knyazev, Daniel B. Werz   +4 more
wiley   +1 more source

Competitive Retro-Cycloaddition Reaction in Fullerene Dimers Connected through Pyrrolidino-pyrazolino Rings [PDF]

, 2009
International ...
Bouit, Pierre-Antoine, Delgado, Juan Luis, Espíldora, Eva, Martín, Nazario, Martínez-Alvarez, Roberto, Osuna, Sílvia, Solà, Miquel   +6 more
core   +2 more sources

The regioselective synthesis of spirooxindolo pyrrolidines and pyrrolizidines via three-component reactions of acrylamides and aroylacrylic acids with isatins and α-amino acids

Beilstein Journal of Organic Chemistry, 2014
The regioselective three-component condensation of azomethine ylides derived from isatins and α-amino acids with acrylamides or aroylacrylic acids as dipolarophiles has been realized through a one-pot 1,3-dipolar cycloaddition protocol.
Tatyana L. Pavlovskaya, Fedor G. Yaremenko, Victoria V. Lipson, Svetlana V. Shishkina, Oleg V. Shishkin, Vladimir I. Musatov, Alexander S. Karpenko   +6 more
doaj   +1 more source

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, Jo, Ala, Kim, Eunha, Lee, Youngjun, Park, Seung Bum   +4 more
core   +1 more source

Synthesis of Dihydrouracils Spiro-Fused to Pyrrolidines: Druglike Molecules Based on the 2-Arylethyl Amine Scaffold

Molecules, 2010
The synthesis of a small library of dihydrouracils spiro-fused to pyrrolidines is described. These compounds are synthesized from b-aryl pyrrolidines, providing products with the 2-arylethyl amine moiety, a structural feature often encountered in ...
Daniel Blanco-Ania, Carolina Valderas-Cortina, Pedro H.H. Hermkens, Leo A.J.M. Sliedregt, Hans W. Scheeren, Floris P.J.T. Rutjes   +5 more
doaj   +1 more source