A Novel and Selective Fluoride Opening of Aziridines by XtalFluor-E. Synthesis of Fluorinated Diamino Acid Derivatives
作者:Melinda Nonn、Loránd Kiss、Matti Haukka、Santos Fustero、Ferenc Fülöp
DOI:10.1021/acs.orglett.5b00182
日期:2015.3.6
of an aminocyclopentane or cyclohexane carboxylate has been developed through a novel and efficientfluorideopening of an activated aziridine ring with XtalFluor-E. The reaction proceeded through a stereoselective aziridination of the olefinic bond of a bicyclic lactam and regioselective aziridine ringopening with difluorosulfiliminium tetrafluoroborate with the neighboring group assistance of the
Stereo- and regiocontrolled synthesis of highly functionalized cyclopentanes with multiple chiral centers
作者:Melinda Nonn、Adrienn Binder、Balázs Volk、Loránd Kiss
DOI:10.1080/00397911.2020.1733612
日期:2020.4.17
Abstract The synthesis of some highly substituted three-dimensional cyclopentanes with multiple chiral centers and with high regiochemical and stereochemical diversity has been accomplished starting from cyclopentadiene-derived aminocyclopentenecarboxylic acids. The small-molecular design consisted of stereo- and regiocontrolled functionalization of the starting cyclopentene β- and γ-amino acids through
Synthesis of Highly Functionalized Fluorinated Cispentacin Derivatives
作者:Melinda Nonn、Loránd Kiss、Mikko M. Hänninen、Reijo Sillanpää、Ferenc Fülöp
DOI:10.1002/cbdv.201200323
日期:2012.11
Fluorinated highly functionalized cispentacin derivatives were synthetised starting from an unsaturated bicyclic β‐lactam through CC bond functionalizationvia the dipolarcycloaddition of a nitrileoxide, isoxazoline opening, and fluorination by OH/F exchange.
Efficient Synthesis of Hydroxy-Substituted Cispentacin Derivatives
作者:Gabriella Benedek、Márta Palkó、Edit Wéber、Tamás A. Martinek、Enikő Forró、Ferenc Fülöp
DOI:10.1002/ejoc.200800345
日期:2008.7
xylic acid derivatives, isomers of 2-amino-3-hydroxycyclopentanecarboxylic acid (8 and 12) were prepared via oxazoline intermediates, whereas the stereoisomeric 2-amino-3,4-dihydroxycyclopentanecarboxylic acids 14 and 17 were synthesized by OsO4-catalyzed oxidation. The enantiomers of 8 and 14 were also prepared by the same pathway. The structures, stereochemistry and relative configurations of the
Diastereo- and Enantioselective Synthesis of Orthogonally Protected 2,4-Diaminocyclopentanecarboxylates: A Flip from β-Amino- to β,γ-Diaminocarboxylates
作者:Loránd Kiss、Enikó Forró、Reijo Sillanpää、Ferenc Fülöp
DOI:10.1021/jo701332v
日期:2007.11.1
Conformationally restricted, orthogonally protected 2,4-diaminocarboxylates with a cyclopentane skeleton were efficiently synthesized from β-lactam 6, the syntheses involving strategies of diastereoselective epoxidation of the β-lactam and the corresponding monoprotected amino esters with opposite selectivities followed by regioselective opening of the oxirane ring with sodium azide. The enantiomers