Results 71 to 80 of about 4,038 (213)

Phosphoramidite-Cu(OTf)2 complexes as chiral catalysts for 1,3-dipolar cycloaddition of iminoesters and nitroalkenes [PDF]

, 2013
Chiral complexes formed by phosphoramidites such as (Sa,R,R)-9 and Cu(OTf)2 are excellent catalysts for the general 1,3-dipolar cycloaddition between azomethine ylides and nitroalkenes affording the corresponding tetrasubstituted proline esters mainly as
Castelló Moncayo, Luis Miguel, Cossío Mora, Fernando Pedro, Cózar Ruano, Abel de, Larrañaga Agirre, Olatz, Nájera, Carmen, Sansano, Jose M.   +5 more
core   +2 more sources

Heat‐Induced Toxicants: Sensory Appeal Distracts Consumers' Attention From Potential Toxicological Risks of Thermally Processed Foods

Food Science &Nutrition, Volume 14, Issue 4, April 2026.
The central paradox of thermal processing of foods. (A) The application of heat (e.g., frying, baking, grilling) to food initiates complex chemical reactions, most notably the Maillard reaction and thermal degradation of protein, lipids, and carbohydrate. (B) These reactions create a desirable sensory experience characterized by enticing aromas, golden‐
Joachim Dotto Matondo, Abdulsudi Issa‐Zacharia   +1 more
wiley   +1 more source

Copper–phenanthroline catalysts for regioselective synthesis of pyrrolo[3′,4′:3,4]pyrrolo[1,2-a]furoquinolines/phenanthrolines and of pyrrolo[1,2-a]phenanthrolines under mild conditions

Beilstein Journal of Organic Chemistry, 2014
A new series of pyrrolo[3′,4′:3,4]pyrrolo[1,2-a]furoquinolines/phenanthrolines and pyrrolo[1,2-a]phenanthrolines were efficiently built up from an 8-hydroxyquinoline derivative or phenanthroline via 1,3-dipolar cycloaddition reaction involving non ...
Rupankar Paira, Tarique Anwar, Maitreyee Banerjee, Yogesh P. Bharitkar, Shyamal Mondal, Sandip Kundu, Abhijit Hazra, Prakas R. Maulik, Nirup B. Mondal   +8 more
doaj   +1 more source

Synthesis of enantiomeric polyhydroxyalkylpyrrolidines from 1,3-dipolar cycloadducts. Evaluation as inhibitors of a β-galactofuranosidase [PDF]

, 2016
Enantiomeric 2,3,4-tris(hydroxyalkyl)-5-phenylpyrrolidines have been synthesized from the major cycloadducts obtained by the 1,3-dipolar cycloaddition of sugar enones with azomethine ylides derived from natural amino acids.
Oliveira Udry, Guillermo Alejandro, Repetto, Evangelina, Varela, Oscar Jose, Vega, Daniel Roberto   +3 more
core   +2 more sources

Bis‐Furans: A Sustainable Source of Diverse Molecular Architectures

European Journal of Organic Chemistry, Volume 29, Issue 10, 9 March 2026.
A concise synthetic route to diverse acyclic and heterocyclic compounds has been developed by combining hetero‐Diels–Alder reactions, DBU‐promoted ring openings, and Lewis base‐catalyzed annulations. Nitrosoalkenes reacted with furan derivatives to form 4a,7a‐dihydro‐4H‐furo[2,3‐e][1,2]oxazines, which underwent DBU‐promoted rearrangements to 6H‐1,2 ...
Ana L. Cardoso, José A. Paixão, Teresa M. V. D. Pinho e Melo   +2 more
wiley   +1 more source

Optical microcavity with semiconducting single-wall carbon nanotubes [PDF]

, 2010
We report studies of optical Fabry-Perot microcavities based on semiconducting single-wall carbon nanotubes with a quality factor of 160. We experimentally demonstrate a huge photoluminescence signal enhancement by a factor of 30 in comparison with the ...
Adam, Arnold, Arnold, Avouris, Chen, Delphine Marris-Morini, Eric Cassan, Etienne Gaufrès, Gaufrès, Itkis, Izard, Laurent Vivien, Lefebvre, Ménard-Moyon, Nicolas Izard, Nish, O’Connell, Qian, Saïd Kazaoui, Vahala, Xavier Le Roux, Xia   +21 more
core   +3 more sources

Nano‐ and Micro‐Sized Solid Materials Used as Antiviral Agents

Advanced Functional Materials, Volume 36, Issue 26, 30 March 2026.
Due to the rise of viral infections in humans and possible viral outbreaks, the use of nano‐ or micro‐sized materials as antiviral agents is rapidly increasing. This review explores their antiviral properties against RNA and DNA viruses, either as a prevention or a treatment tool, by delving into their mechanisms of action and how to properly assess ...
Orfeas‐Evangelos Plastiras, Imelda Raczkiewicz, Peggy Bouquet, Jean‐Philippe Dacquin, Jeremy Dhainaut, Anne Goffard, Christophe Volkringer   +6 more
wiley   +1 more source

Diastereoselective Synthesis of C60/Steroid Conjugates [PDF]

, 2013
The design and synthesis of fullerene–steroid hybrids by using Prato’s protocol has afforded new fullerene derivatives endowed with epiandrosterone, an important naturally occurring steroid hormone.
Ajamaa F., Alberto Ruiz, An Y., Beck M. T., Bjelakovic M. S., Campidelli S., Coro J., Da Ros T., Dolores Molero, Doss S. H., Echegoyen L. E., Eliel E. L., Enrique E. Maroto, Filippone S., Florent Di Meo, Fong R., Grimme S. J., Grimme S. J., Grimme S. J., Guldi D. M., Gupte S. A., Hirsch A., Illescas B., Illescas B. M., Ioutsi V. A., Ishi-I T., Itoh T., José A. Ruiz, Juan Carlos Sancho-García, Julieta Coro, Li L., Luis Almagro, Maggini M., Margarita Suárez, Maroto E., Maroto E. E., Maroto E. E., Martín N., Martín N., María Ángeles Herranz, Merlani M. I., Nazario Martín, Neese F., Novello F., Pantarotto D., Prato M., Raeside J. I., Reyes-Moreno M., Reyes-Moreno M., Roberto Martínez-Álvarez, Salvatore Filippone, Sawai K., Schuster D. I., Schwabe T., Tan X., Wilson S. R.   +55 more
core   +2 more sources

Sulfur Ylides in Skeletal‐Editing—Ring Expansion Reactions

Helvetica Chimica Acta, Volume 109, Issue 3, March 2026.
Sulfur ylides (S‐ylides) are emergent diazo surrogates that enable skeletal editing and ring expansion with safer handling and broad functional group tolerance. This perspective covers pioneer works and highlights recent advances in the field, while outlining key challenges and future directions that may redefine the role of S‐ylides in modern ...
Arsala Kamal, Olaf Tjabben, Ana Matošević, Olga García Mancheño   +3 more
wiley   +1 more source

Synthesis of bis-spirocyclic derivatives of 3-azabicyclo[3.1.0]hexane via cyclopropene cycloadditions to the stable azomethine ylide derived from Ruhemann's purple

Beilstein Journal of Organic Chemistry, 2022
A reliable method for the synthesis of bis-spirocyclic derivatives of 3-azabicyclo[3.1.0]hexanes through the 1,3-dipolar cycloaddition (1,3-DC) reactions of cyclopropenes to the stable azomethine ylide – protonated form of Ruhemann's purple (PRP) has ...
Alexander S. Filatov, Olesya V. Khoroshilova, Anna G. Larina, Vitali M. Boitsov, Alexander V. Stepakov   +4 more
doaj   +1 more source