Results 1 to 10 of about 3,335 (198)

Recent Advances in Asymmetric Organocatalyzed Conjugate Additions to Nitroalkenes

Molecules, 2017
The asymmetric conjugate addition of carbon and heteroatom nucleophiles to nitroalkenes is a very interesting tool for the construction of highly functionalized synthetic building blocks.
Gabriela Guillena, Cecilia Gómez, Alejandro Baeza   +2 more
exaly   +3 more sources

Ammonia–Borane-Mediated Reduction of Nitroalkenes [PDF]

SynOpen, 2020
Ammonia borane (AB) has been successfully employed in the reduction of nitroalkenes. A variety of nitrostyrenes and alkyl-substituted­ nitroalkenes were chemoselectively reduced to the corresponding nitroalkanes, in short reaction time, with an atom ...
Chiara Faverio, Monica Fiorenza Boselli, Laura Raimondi, Maurizio Benaglia   +3 more
doaj   +3 more sources

Synthesis of Amino-Acid-Based Nitroalkenes

Organics, 2022
Fatty-acid-based nitroalkenes have recently received great attention because of their bioactivities. On the contrary, peptide- or amino-acid-based nitroalkenes have been scarcely explored so far, although they may exhibit interesting biological ...
Velisaria-Eleni Gerogianni, Giorgos S. Koutoulogenis, Dimitrios Triantafyllos Gerokonstantis, George Kokotos   +3 more
doaj   +1 more source

Fully Selective Synthesis of Spirocyclic-1,2-oxazine N-Oxides via Non-Catalysed Hetero Diels-Alder Reactions with the Participation of Cyanofunctionalysed Conjugated Nitroalkenes

Molecules, 2023
Hetero Diels-Alder (HDA) reactions with the participation of E-2-aryl-1-cyano-1-nitroethenes and methylenecyclopentane were evaluated on the basis of experimental as well as quantumchemical data.
Przemysław Woliński, Agnieszka Kącka-Zych, Aneta Wróblewska, Ewelina Wielgus, Rafał Dolot, Radomir Jasiński   +5 more
doaj   +1 more source

Iridium-Catalyzed and pH-Dependent Reductions of Nitroalkenes to Ketones

Molecules, 2022
A highly chemoselective conversion of α,β-disubstituted nitroalkenes to ketones is developed. An acid-compatible iridium catalyst serves as the key to the conversion.
Tingting Wang, Changmeng Liu, Dong Xu, Jiaxi Xu, Zhanhui Yang   +4 more
doaj   +1 more source

Use of Phenyl Formate as a CO Surrogate for the Reductive Cyclization of Organic Nitro Compounds to Yield Different N-Heterocycles: Avoiding the Use of Autoclaves and Pressurized Gases

Chemistry Proceedings, 2022
The reductive cyclization of different organic nitro compounds by carbon monoxide, catalyzed by transition metal complexes, is a very efficient and clean strategy for the synthesis of many N-heterocycles.
Fabio Ragaini, Francesco Ferretti, Manar Ahmed Fouad   +2 more
doaj   +1 more source

N-Sulfinylpyrrolidine-containing ureas and thioureas as bifunctional organocatalysts

Beilstein Journal of Organic Chemistry, 2021
The synthesis of bifunctional N-sulfinylureas and thioureas with an appended pyrrolidine unit is presented. These organocatalysts were evaluated in Michael additions of aldehydes to nitroalkenes both under solvent-free conditions and in solution.
Viera Poláčková, Dominika Krištofíková, Boglárka Némethová, Renata Górová, Mária Mečiarová, Radovan Šebesta   +5 more
doaj   +1 more source

The Participation of 3,3,3-Trichloro-1-nitroprop-1-ene in the [3 + 2] Cycloaddition Reaction with Selected Nitrile N-Oxides in the Light of the Experimental and MEDT Quantum Chemical Study

Molecules, 2021
The regioselective zw-type [3 + 2] cycloaddition (32CA) reactions of a series of aryl-substituted nitrile N-oxides (NOs) with trichloronitropropene (TNP) have been both experimentally and theoretically studied within the Molecular Electron Density Theory
Karolina Zawadzińska, Mar Ríos-Gutiérrez, Karolina Kula, Przemysław Woliński, Barbara Mirosław, Tomasz Krawczyk, Radomir Jasiński   +6 more
doaj   +1 more source

Full Regio- and Stereoselective Protocol for the Synthesis of New Nicotinoids via Cycloaddition Processes with the Participation of Trans-Substituted Nitroethenes: Comprehensive Experimental and MEDT Study

Molecules, 2023
[3 + 2] Cycloaddition reactions with the participation of Z-C-(3-pyridyl)-N-methylnitrone and series of E-2-R-nitroethenes were both experimentally and theoretically explored in the framework of Molecular Electron Density Theory.
Jowita Kras, Przemysław Woliński, Roman Nagatsky, Oleg M. Demchuk, Radomir Jasiński   +4 more
doaj   +1 more source

Understanding the Regioselectivity and the Molecular Mechanism of [3 + 2] Cycloaddition Reactions between Nitrous Oxide and Conjugated Nitroalkenes: A DFT Computational Study

Molecules, 2022
Regiochemical aspects and the molecular mechanism of the [3 + 2] cycloaddition between nitrous oxide and conjugated nitroalkenes were evaluated on the basis of the wb97xd/6-311 + G(d) (PCM) computational study.
Ewa Dresler, Aneta Wróblewska, Radomir Jasiński   +2 more
doaj   +1 more source