Results 81 to 90 of about 17,972 (231)

Studies in Conjugated lmines: Nucleophilic Additions and the 1 ,3-Dipolar Cycloadditions

, 1970
Studies in Conjugated lmines: Nucleophilic Additions and the 1 ,3-Dipolar ...
Singh, Nazar, P. S. Sethi
openaire   +1 more source

Syntheses and Characterizations of Some New N-alkyl, Isoxazole and Dioxazole Derivatives of 5-Chloroisatin [PDF]

, 2017
N-alkyl and cycloadducts derivatives of 5-Chloroisatin were synthesized in good to excellent yields. The method evidences a selective N-alkylation when using 1,2-bis (2-chloroethoxy) ethane as efficient spacer at room temperature on the 5-Chloroisatin ...
Rodi, Y. K. (Y), Senhaji, O. (O), Skalli, M. K. (M), Tribak, Z. (Z)   +3 more
core   +1 more source

Deciphering the properties and reaction mechanism of anhydromevalonate phosphate decarboxylase, a prenylated flavin mononucleotide‐dependent enzyme in the archaeal mevalonate pathway

The FEBS Journal, EarlyView.
Characterization of anhydromevalonate phosphate decarboxylase, the UbiD‐family decarboxylase involved in the archaeal mevalonate pathway, was conducted. The enzyme is responsible for the biosynthesis of isoprenoids, such as archaeal membrane lipids, respiratory quinones, and dolichols.
Rino Ishikawa, Natsumi Matsushima, Soma Ishimine, Honoka Nakamoto, Hajime Hayakawa, Yoko Yasuno, Tetsuro Shinada, Hiroshi Kawaide, Tomokazu Ito, Hisashi Hemmi   +9 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 Chromen[4,3-b]pyrrolidines by Intramolecular 1,3-Dipolar Cycloadditions of Azomethine Ylides: An Experimental and Computational Assessment of the Origin of Stereocontrol [PDF]

, 2015
Azomethine ylides, generated from imine-derived O-cinnamyl or O-crotonyl salicylaldeyde and α-amino acids, undergo intramolecular 1,3-dipolar cycloaddition, leading to chromene[4,3-b]pyrrolidines.
Arrieta, Ana, Barcellos, Julio C.F., Cossío Mora, Fernando Pedro, Cossío, Unai, Costa, Paulo R.R., Cózar Ruano, Abel de, Dias, Ayres G., Nájera, Carmen, Sansano, Jose M.   +8 more
core   +2 more sources

The Dithiirane–Thiosulfine Equilibrium Revisited—A Computational Study of Structure, Thermodynamics and Kinetics

Journal of Physical Organic Chemistry, Volume 39, Issue 6, June 2026.
The dithiirane–thiosulfine equilibrium has been revisited by means of modern computational chemistry tools to shed light on whether stable thiosulfines might be isolated. ABSTRACT Thiosulfines as reactive S‐centered 1,3‐dipoles undergoing (3 + 2)‐cycloadditions are still of interest in the chemistry of sulfur‐rich heterocycles.
Dirk Buddensiek, Thomas Behrens
wiley   +1 more source

Flow Chemistry Meets Green Solvents: Telescoped Synthesis of Triazolyl Phosphoramidates and Phosphinamides in γ‐Valerolactone

ChemSusChem, Volume 19, Issue 9, 14 May 2026.
A telescoped three‐step continuous flow process enables the synthesis of organophosphorus 1,2,3‐triazoles in the biomass‐derived solvent γ‐valerolactone (GVL). The sequence integrates N‐phosphorylation, azidation, and Cu(I)‐catalyzed azide–alkyne cycloaddition (CuAAC), followed by in‐line copper removal, giving diverse triazoles in good to high overall
Viktória Gerő, Dániel Steinsits, Pál Tamás Szabó, Erika Bálint   +3 more
wiley   +1 more source

Catalytic Asymmetric Synthesis of Bicycloprolines by a 1,3-Dipolar Cycloaddition/Intramolecular Alkylation Strategy [PDF]

, 2016
This document is the Accepted Manuscript version of a Published Work that appeared in final form inJournal of Organic Chemistry, copyright © American Chemical Society after peer review and technical editing by the publisher.
Adrio, Javier, Arpa, Enrique M., Carretero, Juan C., González-Esguevillas, María, Pascual-Escudero, Ana   +4 more
core   +3 more sources

Asymmetric Transformations of α,β‐Unsaturated Oxazolidinones Catalyzed by C2‐Symmetric Chiral Iron Triad Complexes

Advanced Synthesis &Catalysis, Volume 368, Issue 9, 5 May 2026.
This review highlights the evolution of highly enantioselective oxazolidinone transformations enabled by C2‐symmetric ligands, with emphasis on chiral iron triad complexes as cost‐effective, environmentally benign alternatives to late‐transition‐metal catalysts.
Arthur David, Thierry Ollevier
wiley   +1 more source

Remarkable electronic effect on the total stereoselectivity of the cycloaddition reaction of arylnitrile oxides with pyrrol-2-one derivatives

Heterocyclic Communications, 2019
The regiospecific 1,3-dipolar cycloaddition of 1,5-dihydropyrrol-2-one and arylnitrile oxides derivatives have been investigated. The asymmetric induction expected by the chiral centre of the 5-hydroxy-3-methyl-1,5-dihydropyrrol-2-one derivatives was ...
Guesmi A, Hamadi N Ben
doaj   +1 more source