Results 101 to 110 of about 70,546 (390)

Ethyl 6′-cyano-7′-(p-tolyl)-1′,6′,7′,7a′-tetrahydro-3′H-spiro[indeno[1,2-b]quinoxaline-11,5′-pyrrolo[1,2-c]thiazole]-6′-carboxylate

open access: yesIUCrData, 2019
The title compound, C31H26N4O2S, crystallizes in a triclinic centrosymmetric lattice with two molecules in the unit cell. The five-membered thiazole and pyrrolidine rings adopt twisted and envelope conformations, respectively.
C. Muthuselvi   +6 more
doaj   +1 more source

4-Nitrobenzyl 3,4-bis(acetyloxy)-2-(4-methoxyphenyl)pyrrolidine-1-carboxylate: crystal structure, Hirshfeld surface analysis and computational chemistry

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2020
The title compound, C23H24N2O9, is a tetra-substituted pyrrolidine derivative with a twisted conformation, with the twist evident in the C—C bond bearing the adjacent acetyloxy substituents.
Sofia Dallasta Pedroso   +8 more
doaj   +1 more source

Halogenation Thermodynamics of Pyrrolidinium-Based Ionic Liquids [PDF]

open access: yesarXiv, 2015
Room-temperature ionic liquids (RTILs) exhibit large difference between melting and boiling points. They are highly tunable thanks to numerous accessible combinations of the cation and the anion. On top of that, cations can be functionalized using methods of organic chemistry.
arxiv  

Opposite effects of two zinc(II) dithiocarbamates on NF-kB pathway [PDF]

open access: yes, 2007
Inhibiting nuclear factor-kappaB (NF-kB) activation in anticancer and antiinflammatory therapy is of topical interest. Current research in molecular biology has dramatically advanced in the understanding of the cellular events involved in NF-kB induction.
Boris Cvek   +5 more
core   +2 more sources

Radical‐Polar Crossover Bicyclization Enables a Modular Synthesis of Saturated Bicyclic Amines

open access: yesAdvanced Science, EarlyView.
Herein, we report the successful realization of a radical‐polar crossover bicyclization reaction from easily available cyclopropylamines and substituted alkenes through photoredox catalysis. This approach introduces an innovative methodology for the de novo synthesis of a diverse collection of 4/5‐, 5/5‐, 6/5‐,7/5‐ and 5/6‐fused saturated bicyclic ...
Dewei Feng   +4 more
wiley   +1 more source

Concise Total Syntheses of Leuconoxine‐Type Alkaloids Enabled by Palladium/Norbornene‐Catalyzed Pyrrole Difunctionalization

open access: yesAngewandte Chemie, EarlyView.
Concise total syntheses of five leuconoxine alkaloids have been achieved using a pyrrole‐centered strategy, which features a newly developed palladium/norbornene‐catalyzed pyrrole double C─H functionalization method, a divergent late‐stage oxidative dearomatization tactic, and no use of protecting groups.
Xin Liu   +5 more
wiley   +2 more sources

Efficient gold(I)/silver(I)-cocatalyzed cascade intermolecular N-Michael addition/intramolecular hydroalkylation of unactivated alkenes with α-ketones

open access: yesBeilstein Journal of Organic Chemistry, 2011
The gold(I)/silver(I)-cocatalyzed cascade intermolecular N-Michael addition/intramolecular hydroalkylation reaction offers a simple and efficient method for the synthesis of pyrrolidine derivatives in moderate to excellent product yields and with ...
Ya-Ping Xiao, Xin-Yuan Liu, Chi-Ming Che
doaj   +1 more source

Green synthesis of highly functionalized octahydropyrrolo[3,4-c]pyrrole derivatives using subcritical water, and their anti(myco)bacterial and antifungal activity [PDF]

open access: yes, 2018
A series of novel 2-(thiazol-2-yl)-octahydropyrrolo[3,4-c]pyrroles was synthesized by reaction of octahydropyrrolo[3,4-c]pyrrole N-benzoylthiourea derivatives and α-haloketones in subcritical water at 130 °C in 75-91% yield.
De Coen, Laurens   +4 more
core   +1 more source

Rigorous Conformational Analysis of Pyrrolidine Enamines with Relevance to Organocatalysis

open access: yes, 2017
It has been suggested that the origin of regio- and stereoselectivity in Michael addi- tions of pyrrolidine enamines is achieved by thermodynamic rather than kinetic control through distinct conformational preferences of the enamines.
Tamara Husch   +3 more
semanticscholar   +1 more source

Turning Microstructure in Block Copolymer Membranes: A Facile Strategy to Improve CO2 Separation Performance

open access: yesAdvanced Science, EarlyView.
A simple and effective non‐solvent‐induced microstructure rearrangement (MSR) technique is proposed to enhance the gas separation performance of Pebax 2533 membranes. By immersing Pebax 2533 membranes in amino acid salt solutions to induce MSR, the CO2 permeability of the Pebax 2533‐GlyK 10 wt.% membrane reached 1180 Barrer.
Jing Wei   +16 more
wiley   +1 more source

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