Results 81 to 90 of about 16,682 (222)

New N-Substituted Dipolarophiles in 1,3-Dipolar Cycloaddition of Nitrones [PDF]

, 2006
International audience(N-Vinyl)-1,3-oxazolidin-2-ones, -1,3-oxazolidine-2-thi-ones and -N′-methylimidazolidin-2-one were conveniently used as new dipolarophiles in thermal 1,3-dipolar cycloaddition involving activated nitrones, and led to new 5-N ...
Patrick Rollin, Gaulon-Nourry, Catherine, Arnaud Martel, Arnaud Tatibouët, Tatibouët, A., Gilles Dujardin, Nguyen, T .B., Rollin, Patrick, Sébastien Tardy, Teddy Chapin, Thanh Nguyen, Robert Dhal, Martel, Arnaud, Dujardin, Gilles, Chapin, Teddy, Tardy, Sébastien, Dhal, Robert, Catherine Gaulon   +17 more
core   +1 more source

Cold Orthogonal Translation: A Psychrophilic Pyrrolysyl‐tRNA Synthetase Boosts Genetic Code Expansion in E. coli

Advanced Science, Volume 13, Issue 38, 9 July 2026.
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, Peter Goettig, Michael A. Nash, Juri Rappsilber, Nediljko Budisa   +4 more
wiley   +1 more source

Organocatalytic asymmetric 1,3-dipolarand formal 1,3-dipolar cycloaddition reactions. [PDF]

, 2011
207 p.This thesis consists of four chapters and demonstrates part of my research work on the application of organocatalysis, which has rapidly expanded over the past few decades, in asymmetric 1,3-dipolar and formal 1,3-dipolar cycloaddition reactions ...
Wang, Fei
core  

1,3-Dipolar Cycloadditions of N-Benzyl Furfuryl Nitrones with Electron-rich Alkenes

Molecules, 2000
The 1,3-dipolar cycloaddition reaction of N-benzyl-C-(2-furyl)nitrones with electron-rich alkenes gives preferentially trans-substituted 3,5-disubstituted isoxazolidines (endo approach).
Tomas Tejero, Francisco L. Merchan, Sonia Anoro, Pedro Merino   +3 more
doaj   +1 more source

Aliphatic Poly(Carbonate)s with Acid Responsive Release Mechanisms for Micellar Anti‐Tumor Drug Delivery

Macromolecular Rapid Communications, Volume 47, Issue 14, 20 July 2026.
Micellar systems based on biodegradable aliphatic polycarbonates and acid‐responsive triggers enhance drug solubility, stability, and tumor‐selective release. This review covers micelles with acid‐cleavable drug linkages and those that disassemble via acid‐sensitive functionalities.
Adrian V. Hauck, Lutz Nuhn
wiley   +1 more source

Synthesis of 1,4-naphthoquinone derivatives using 1,3-dipolar cycloaddition and Sonogashira reactions

Orbital: The Electronic Journal of Chemistry, 2010
Naphthoquinones are known according to their important bio-activities, such as their antitumoral and topoisomerase inhibition properties. From 2-azido (3) or 2,3-diacetylene-1,4-naphthoquinone (4) it was possible to obtain triazole derivatives ...
Wilson Silva do Nascimento, Mauro Gomes da Silva, Ronaldo Nascimento de Oliveira, Celso Amorim Câmara   +3 more
doaj  

New Quinazolin-4(3H)-One Derivatives Incorporating Isoxazole Moiety as Antioxidant Agents: Synthesis, Structural Characterization, and Theoretical DFT Mechanistic Study

Pharmaceuticals
Background: This research centers on the development and spectroscopic characterization of new quinazolin-4(3H)-one-isoxazole derivatives (5a–e). The aim was to investigate the regioselectivity of the 1,3-dipolar cycloaddition involving arylnitriloxides ...
Yassine Rhazi, Riham Sghyar, Noemi Deak, Bouchra Es-Sounni, Bouchra Rossafi, Albert Soran, Mustapha Laghmari, Azize Arzine, Asmae Nakkabi, Khalil Hammani, Samir Chtita, Mohammed M. Alanazi, Gabriela Nemes, Mohamed El. Yazidi   +13 more
doaj   +1 more source

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
doaj   +1 more source

1,3-Dipolar cycloaddition reactions of tetra- and tripyridylporphyrins [PDF]

, 2020
1,3-dipolarna cikloadicija jedna je od najvažnijih metoda u organskoj kemiji za sintezu peteročlanih prstena. Ovdje dolazi do reakcije između vrste zwitterionske rezonantne strukture, odnosno 1,3-dipola i spoja koji u svojoj strukturi ima višestruku vezu,
Vincetić, Magdalena
core  

Catalytic Enantioselective 1,3-Dipolar Cycloaddition of C,N-Cyclic Azomethine Imines with α,β-Unsaturated Aldehydes [PDF]

, 2016
Catalytic Enantioselective 1,3-Dipolar Cycloaddition of C,N-Cyclic Azomethine Imines with α,β-Unsaturated ...
Masato Omote (2309356), Hiroki Nakatsu (1892875), Yuko Maeda (2182538), Keiji Maruoka (1433869), Takuya Hashimoto (1374681)   +4 more
core   +3 more sources