Search results for "Wald"

L'étoffe d'un dirigeant : Waldeck Rochet dans les "Petites Russies" des campagnes françaises

2004

“Emerson's Napoleon; or, the French Emperor as (American) Democrat and Businessman”

2005

International audience

'Rosemarie Waldrop : A Poetics of Contiguity' in 'Poètes américaines : architectes du langage',

2005

International audience; Construction énergétique émergeant d’un champ compositionnel, le poème de Rosmarie Waldrop est chronique de son écriture, d’un processus permanent de composition/décomposition. Matérialiste, l’approche de Waldrop dans A Key into the Language of America permet l’interaction entre discours passé et discours présent. Le moi est un carrefour et une dissémination dans la pluralité de ses actions, le poète est créateur de lieux successifs où l’expérience du langage se fait dans le conflit. Les modes paratactiques chez Rosmarie Waldrop rattachent des textes empruntés au xviie siècle au devenir de cette expérience et révèlent comme horizon de la poésie contemporaine la postu…

“Ralph Waldo Emerson’s Intellectual Declaration of Independence”

2002

International audience

“The Rhetoric of Nationalism in Emerson's ‘The American Scholar.'”

2004

International audience

“Ralph Waldo Emerson's Intellectual Declaration of Independence”

2003

“The Rhetoric of Nationalism in Emerson’s ‘The American Scholar’”

2001

This article studies the nationalistic rhetoric in Emerson’s “The American Scholar.” It argues that if the current critical tendency to downplay the essay’s nationalism can be seen as a welcome corrective to certain traditional readings, the address, in fact, includes a significant presence of embedded nationalistic rhetoric that has largely been ignored. The study focuses on Emerson ’s incorporation of the language of expansionism and imperialism, his adoption of an ahistorical perspective and his use of the vocabulary of action, heroism and Anglo-Saxonism to show that both the address’s nationalistic rhetoric and Emerson ’s complicity in the nationalistic ideology of his time are more pro…

Experimental and DFT study of the conversion of ephedrine derivatives into oxazolidinones. Double SN2 mechanism against SN1 mechanism

2010

Sulfonation of the N-Boc derivatives of 1,2-aminoalcohols, such as ephedrine, pseudoephedrine, norephedrine, norpseudoephedrine, thiomicamine, and chloramphenicol yields a mixture of the corresponding oxazolidinones with inversion (erythro derivatives) and/or retention of configuration (threo derivatives)at C5. We suggest a competition between two mechanisms: an intramolecular SN2 process initiated by attack of the carbonyl oxygen of the Boc group to the benzylic carbon and the other one through a double SN2 process. In the erythro derivatives the first mechanism is predominant, while in the threo derivatives both mechanisms have similar energy. This hypothesis is supported by theoretical c…

Revisiting the bromination of 3β-hydroxycholest-5-ene with CBr4/PPh3 and the subsequent azidolysis of the resulting bromide, disparity in stereochemi…

2023

Cholesterol reacts under Appel conditions (CBr4/PPh3) to give 3,5-cholestadiene (elimination) and 3β-bromocholest-5-ene (substitution with retention of configuration). Thus, the bromination of cholesterol deviates from the stereochemistry of the standard Appel mechanism due to participation of the Δ5 π-electrons. In contrast, the subsequent azidolysis (NaN3/DMF) of 3β-bromocholest-5-ene proceeds predominantly by Walden inversion (SN2) affording 3α-azidocholest-5-ene. The structures of all relevant products were revealed by X-ray single crystal structure analyses, and the NMR data are in agreement to the reported ones. In light of these findings, we herein correct the previous stereochemical…

Liquid structure of a choline chloride-water natural deep eutectic solvent: A molecular dynamics characterization

2021

The liquid structure of a representative of the first water-in-salt (WiS) Natural Deep Eutectic Solvents (NADES), hereinafter indicated as aquoline, a mixture of choline chloride (ChCl) and water with molar ratio 1:3.33, is ex- plored at ambient conditions. Using Molecular Dynamics (MD) simulation tools, we extract structural informa- tion at atomistic level on the nature of inter-correlations between the different moieties. Despite being a very fluid liquid, with much lower viscosity than other common ChCl-based DES, aquoline turns out to be very struc- tured. Computed X-ray and neutron weighted scattering patterns (the latter also on selectively deuterated mix- tures) highlight the existe…