Identification of the monoanions and of their complexes with lithium salts possibly formed in solution during the alkylation of lithiated phenylacetonitrile dianions: Infrared spectroscopy and density functional theory calculations

Autor: Tekla Strzalko, Lya Wartski, Françoise Froment, J. Corset, Martine Castellà-Ventura

Publikováno v: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy [1994-...]
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy [1994-..], 2007, 68 (5), pp.1340-1346. ⟨10.1016/j.saa.2007.02.014⟩

The carbanionic species possibly formed during the first alkylation step of phenylacetonitrile lithiated anion by CH 3 I and PhCH 2 Cl in THF–hexane solution and their complexes with the lithium salt formed have been observed by infrared spectromet

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cb3097fb7cce173818917a8ad6f0836d
https://doi.org/10.1016/j.saa.2007.02.014

Formation mechanism of acetaldehyde lithium enolate by reaction ofn-butyllithium with tetrahydrofuran: infrared and Raman spectroscopy and density functional theory calculations

Autor: Françoise Froment, J. Corset, Tekla Strzalko, Martine Castellà-Ventura, Lya Wartski

Publikováno v: Journal of Raman Spectroscopy. 33:652-668

Depending on the reaction conditions, n-butyllithium (n-BuLi), as a base, may react both with the reactants and with the solvent. Thus, it has been shown that the n-BuLi dimer reacts with tetrahydrofuran (THF) to give acetaldehyde lithium enolate (CH

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::324b31a2292e36245a779b8692a68fcf
https://doi.org/10.1002/jrs.896

High degree of exo selectivity in imino Diels-Alder reactions catalyzed by tert-butyldimethylsilyltriflate

Autor: Lya Wartski, Renée Paugam, Denise Nogue

Publikováno v: Tetrahedron Letters. 33:1265-1268

Diels-Alder reactions of silyloxydiene 1 derived from 1-acetylcyclohexene with imines 2b and 2c occur with high exo selectivity depending upon experimental conditions: exo cycloadducts 3b–c are exclusively formed under kinetic control using tert-bu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a51b1eda8ab734e23cb1121d8aa36050
https://doi.org/10.1016/s0040-4039(00)91597-1

Structural and vibrational characterization of the mono and dilithiated species derived from phenylacetonitrile in THF by infrared and Raman spectroscopy and density functional theory calculations

Autor: Martine Castellà-Ventura, J. Corset, Lya Wartski, Tekla Strzalko, Françoise Froment

Publikováno v: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy [1994-...]
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy [1994-..], 2002, 58 (9), pp.1971-1986. ⟨10.1016/s1386-1425(01)00648-5⟩

The structures and spectra of mono and dianionic species derived from PhCH2CN under the action of an organic base LHMDS or n-BuLi in THF solution have been investigated by vibrational spectroscopy and DFT calculations. The assignments previously prop

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::706540568ff13c4717180537666beb4e
https://hal.science/hal-04024113

Influence of the Lewis acid on the nucleophilic addition to β,β-disubstituted α-enones

Autor: Lya Wartski, M Zervos

Publikováno v: Tetrahedron Letters. 27:2985-2988

Lewis acids as BF3.Et2O, Ti(OiPr)4, ZnCl2 allow the Michael addition of lithiated aminonitrile 1 to β,β-disubstituted α-enones leading thus after carbonyl unmasking to the corresponding diketones.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ade189c4af9f2b314550187096883427
https://doi.org/10.1016/s0040-4039(00)84697-3