derniers depôts

Ajouté le 17/06/2020

Despite the latest advances in catalysts efficiency, using one single catalytic activation mode can lead to considerable limitations. To overcome reactivity or selectivity issues, multi‐catalytic combinations can represent interesting alternatives. This manuscript reviews the recent transformations developed in my group through the combination between cheap iron or copper complexes and organo‐catalysis.

Ajouté le 17/06/2020

In order to improve epoxides conversion to carbonates by fixation of CO2 a new type of perfluorinated triol catalysts was developed. These simple acyclic scaffolds of enhanced acidity are efficient for catalysis through selective H-bonding activation of the epoxide. In combination with TBAI as co-catalyst, this useful transformation is performed under only 1 atmosphere of CO2 and between 30 to 80 °C.

Ajouté le 17/06/2020

By a selective three‐component multi‐catalytic sequence, amino‐catalyzed oxa‐Michael addition of oximes to α,β‐unsaturated aldehydes has been combined with a copper‐catalyzed decarboxylative aldolization. This one‐pot procedure enables the rapid construction of functionalized ketodiol scaffolds in 85 to 94% ee. Simple reduction of both the resulting oxime and ketone functions delivered the corresponding 1,3,5‐triols of interest in a minimum of steps while considerably limiting waste generation.

Ajouté le 17/06/2020

Despite the latest advances in catalysts efficiency, using one single catalytic activation mode can lead to considerable limitations. To overcome reactivity or selectivity issues, multi‐catalytic combinations can represent interesting alternatives. This manuscript reviews the recent transformations developed in my group through the combination between cheap iron or copper complexes and organo‐catalysis.

Ajouté le 17/06/2020

The quantum theory has modified the way we interpret what in the past was commonly called "physical reality". As an example, according to the standard interpretation of quantum mechanics (the so-called probabilistic interpretation of Copenhagen), the properties of a quantum object have no physical reality, at least not before the observer measures them.

Ajouté le 17/06/2020

Alzheimer's disease (AD) is becoming the dominant type of neurodegenerative brain disease in elderly people, which is incurable and irreversible for now. It is expected to diagnose its early stage, Mild Cognitive Impairment (MCI), then interventions can be applied to delay the onset.

Ajouté le 16/06/2020

We investigate attosecond charge migration (CM) in model carbon chains by employing tools from nonlinear dynamics. We show that mean-field interactions drive synchronization of the electron motion and give rise to a variety of CM dynamics. Notably, we find that a molecule can support several current-like CM modes, depending on the initial conditions, with periods varying by several hundred attoseconds.

Ajouté le 15/06/2020

This paper is about a little known part of Allais’ oeuvre, namely his restatement of the quantity theory of money. It shows that this restatement contains an original refinement of the notion of stability of the relative demand for money. To explain this refinement, this essay investigates Allais’ concept of psychological time – a concept strongly emphasised but not duly examined by most of his commentators.

Ajouté le 16/06/2020

We introduce an approach based on functional data analysis to identify patterns of malaria incidence to guide effective targeting of malaria control in a seasonal transmission area. Using functional data method, a smooth function (functional data or curve) was fitted from the time series of observed malaria incidence for each of 575 villages in west-central Senegal from 2008 to 2012.

Ajouté le 13/06/2020

In this paper, we consider Carleman estimates and inverse prob-6 lems for the coupled quantitative thermoacoustic equations. In the previous Part 7 I paper, we established Carleman estimates for the coupled quantitative thermoa-8 coustic equations by assuming that the coefficients satisfy suitable conditions.

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