Results 91 to 100 of about 5,623 (241)

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

Surface Grafting of Graphene Flakes with Fluorescent Dyes: A Tailored Functionalization Approach [PDF]

Nanomaterials 2025, 15, 329
The controlled functionalization of graphene is critical for tuning and enhancing its properties, thereby expanding its potential applications. Covalent functionalization offers a deeper tuning of the geometric and electronic structure of graphene compared to non-covalent methods; however, the existing techniques involve side reactions and spatially ...
arxiv   +1 more source

Covalent Functionalisation of rGO and Nanodiamonds: Complementary Versatility and Applicability of Azomethine Ylide, Nitrile Oxide and Nitrone

ChemPlusChem, Volume 90, Issue 3, March 2025.
1,3‐DCA of nitrone and nitrile oxide to carbon based nanomaterial has been adapted from rGO to yield more stable, unique and biocompatible NDs. This strategy provides an economical, rapid, and efficient method for the production of pure, hydrophilic carbon nanomaterials, which are suitable for a wide range of applications.
Katia Martina, Silvia Tagliapietra, Federica Calsolaro, Andrei Paraschiv, Mirko Sacco, Federico Picollo, Sofia Sturari, Pietro Aprà, Lorenzo Mino, Alessandro Barge, Giancarlo Cravotto   +10 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

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

An effective one-pot access to polynuclear dispiroheterocyclic structures comprising pyrrolidinyloxindole and imidazothiazolotriazine moieties via a 1,3-dipolar cycloaddition strategy

Beilstein Journal of Organic Chemistry, 2016
An effective and highly regio- and diastereoselective one-pot method for the synthesis of new polynuclear dispiroheterocyclic systems with five stereogenic centers (dispiro[imidazo[4,5-e]thiazolo[3,2-b]-1,2,4-triazine-6,3′-pyrrolidine-2′,3′′-indoles ...
Alexei N. Izmest’ev, Galina A. Gazieva, Natalya V. Sigay, Sergei A. Serkov, Valentina A. Karnoukhova, Vadim V. Kachala, Alexander S. Shashkov, Igor E. Zanin, Angelina N. Kravchenko, Nina N. Makhova   +9 more
doaj   +1 more source

Modern Methods for Conjugated Polymers Preparation: A Concept of Transition Metal‐Free Synthesis

European Journal of Organic Chemistry, Volume 28, Issue 2, January 10, 2025.
Conjugated polymers (CPs) are promising organic materials currently at the center of the organic electronics revolution. Synthesis strategies play a crucial role in the rise of this field, and this review aims to shed light on transition metal‐free organic chemistry for the synthesis of conjugated polymers, which is currently experiencing a renaissance.
Tomaž Kotnik, Sebastijan Kovačič
wiley   +1 more source

An efficient and facile access to highly functionalized pyrrole derivatives

Beilstein Journal of Organic Chemistry, 2018
A straightforward and one-pot synthesis of pyrrolo[3,4-c]pyrrole-1,3-diones via Ag(I)-catalyzed 1,3-dipolar cycloaddition of azomethine ylides with N-alkyl maleimide, followed by readily complete oxidation with DDQ, has been successfully developed ...
Meng Gao, Wenting Zhao, Hongyi Zhao, Ziyun Lin, Dongfeng Zhang, Haihong Huang   +5 more
doaj   +1 more source

New Chiral Auxiliaries For The [3+2]-Cycloaddition Of Nonstabilised Azomethine Ylides [PDF]

, 1999
The [3+2]-cycloaddition reaction of nonstabilised azomethine ylides to alkenes is a valuable synthetic method for the assembly of functionalised pyrrolidines.
Jensen, Allan Rostrup Forup
core  

Enantioselective Organozinc Addition to Aldehydes Using Planar Chiral [2.2]Paracyclophane‐Imidazoline N,O‐Ligands

Chemistry – A European Journal, Volume 30, Issue 72, December 23, 2024.
A convenient synthesis of planar chiral [2.2]paracyclophane imidazoline N,O‐ligands has been developed. The application of these classes of ligands showed excellent performance in organozinc additions to aldehydes. An improved seven‐step synthesis of [2.2]paracyclophane‐imidazoline N,O‐ligands (UCD‐Imphanols) possessing both central and planar ...
Sundaravel Vivek Kumar, Patrick J Guiry
wiley   +1 more source