Results 11 to 20 of about 55,156 (263)

Design, synthesis, conformational analysis and nucleic acid hybridisation properties of thymidyl pyrrolidine-amide oligonucleotide mimics (POM) [PDF]

open access: yes, 2003
Pyrrolidine-amide oligonucleotide mimics (POM) 1 were designed to be stereochemically and conformationally similar to natural nucleic acids, but with an oppositely charged, cationic backbone.
Cooper, M.A.   +5 more
core   +1 more source

5′′-Benzylidene-5-chloro-1′,1′′-dimethyl-4′-phenyldispiro[indoline-3,2′-pyrrolidine-3′,3′′-piperidine]-2,4′′-dione

open access: yesActa Crystallographica Section E, 2014
The title compound, C30H28ClN3O2, features two spiro links, one connecting the piperidine and pyrrolidine rings, and the other connecting the pyrrolidine ring and indole residue. The configuration about the ethene bond is E.
I. S. Ahmed Farag   +4 more
doaj   +1 more source

Beyond the Simple Copper(II) Coordination Chemistry with Quinaldinate and Secondary Amines

open access: yesMolecules, 2020
Copper(II) acetate has reacted in methanol with quinaldinic acid (quinoline-2-carboxylic acid) to form [Cu(quin)2(CH3OH)]∙CH3OH (1) (quin− = an anionic form of the acid) with quinaldinates bound in a bidentate chelating manner.
Barbara Modec, Nina Podjed, Nina Lah
doaj   +1 more source

X=Y–ZH compounds as potential 1,3-dipoles. Part 64: Synthesis of highly substituted conformationally restricted and spiro nitropyrrolidines via Ag(I) catalysed azomethine ylide cycloadditions [PDF]

open access: yes, 2008
1,3-Dipolar reactions of imines of both acyclic and cyclic α-amino esters with a range of nitroolefins using a combination of AgOAc or Ag2O with NEt3 are described.
Albert   +51 more
core   +1 more source

1-(Pyrrolidin-1-yl)ethan-1-iminium chloride

open access: yesIUCrData, 2023
The title compound, C6H13N2+·Cl−, is as an amidinium salt that was isolated as unexpected product from the reaction between acetonitrile, chloroform and pyrrolidine under refluxing conditions.
Rylan Artis   +2 more
doaj   +1 more source

Recent Advances in Intramolecular C─N Bond Formation for Pyrrolidine Synthesis. [PDF]

open access: yesChemistryOpen
This review highlights synthetic advances (2013–2025) in intramolecular C─N bond formation for constructing the pharmaceutically relevant pyrrolidine core. The review is organized into five methodological clusters: 1) intramolecular alkene/alkyne amination; 2) tandem annulations, which involve C─N bond formation as the key step; 3) nucleophilic ...
Kroņkalne R, Turks M.
europepmc   +2 more sources

Sonogashira/N-acyliminium ion aromatic π-cyclisation processes: access to tetra- and pentacyclic lactams [PDF]

open access: yes, 2008
Application of the Sonogashira reaction of N-alkynylimides with 2-iodophenol or 2-iodo-N-tosylaniline affords 2-(N-alkylimino)-benzofurans and indoles in good yield.
Grigg, R., Sridharan, V., Sykes, D.A.
core   +1 more source

One-Pot Route from Halogenated Amides to Piperidines and Pyrrolidines

open access: yesMolecules, 2022
Piperidine and pyrrolidine derivatives are important nitrogen heterocyclic structures with a wide range of biological activities. However, reported methods for their construction often face problems of requiring the use of expensive metal catalysts ...
Qiao Song   +5 more
doaj   +1 more source

Synthesis and biological evaluation of novel PDMP analogues [PDF]

open access: yes, 2006
A new series of hybrid PDMP analogues, based both on PDMP and styryl analogues of natural ceramide, has been synthesized from D-serine. The synthetic route was developed such that future introduction of different aryl groups is straightforward ...
Boldin-Adamsky, Swetlana   +5 more
core   +1 more source

Pyrrolidine nucleotide analogs with a tunable conformation

open access: yesBeilstein Journal of Organic Chemistry, 2014
Conformational preferences of the pyrrolidine ring in nucleotide analogs 7–14 were investigated by means of NMR and molecular modeling. The effect of the relative configuration of hydroxy and nucleobase substituents as well as the effect of the ...
Lenka Poštová Slavětínská   +2 more
doaj   +1 more source

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