142 resultados para Clivage et condensation aldolique


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The reduction of poverty and social exclusion is one of the targets of the European Union's 2020 strategy. The appropriateness and success of such a policy require the choice of relevant indicators that not only highlight poverty gaps between countries but also identify the groups of individuals in each country that need particular attention from social policies. The target retained in the European strategy combines three criteria: people living in households below the monetary poverty threshold, poor people “in terms of standard of living” who live in a situation of severe material deprivation, and those who live in households with very low or zero work intensity. We first show that neither the combination nor the intersection of these three criteria produces an adequate measure of the fight against poverty, or an objective for it. We therefore propose an alternative concept, that of “consistent poverty”, which targets people who simultaneously live below the monetary poverty threshold and above a certain level of material deprivation. The special material deprivation module of the EU-SILC 2009 database allows us to examine two versions of this notion of deprivation: the measurement of “severe” deprivation currently used by the European Union, which adopts a threshold with four items, and an alternative measure of “elementary” material deprivation with a three-item threshold. The intersection between our three-item elementary deprivation criterion and the monetary poverty criterion produces more satisfactory results than those obtained by the European Union approach, in terms of both coherency and profile of the population identified.

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Cet article propose d’utiliser notion d’exotisme religieux afin d’analyser au mieux la dissémination des ressources religieuses « autres » dans les sociétés contemporaines et la relation que les acteurs sociaux entretiennent avec ces ressources. Il s’attachera aussi à montrer que cet outil conceptuel permet de reprendre les analyses qui ont été faites des bricolages composés de ressources symboliques variées, et en particulier d’en saisir les logiques culturelles et sociales. En effet, on a peut-être trop souvent surestimé l’éclectisme des combinaisons élaborées par les acteurs sociaux, pris pour acquise la disponibilité des ressources religieuses en présence et manqué de comprendre l’individualisme religieux de manière satisfaisante.

This article suggests that the notion of religious exoticism allows us to analyse better the diffusion of “other” religious resources in contemporary societies as well as the type of engagement individuals develop with the cultural and religious otherness. It will also try to show that this conceptual tool allows to further the analyzes that have been made about the forms of hybridity that combine diverse symbolic resources, and in particular to grasp its cultural and social logics. Indeed, the understanding of hybridity with foreign religions has sometimes over-estimated its eclecticism, taken for granted the availability of religious resources, and misunderstood religious individualism.

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The Second World War has inspired many French novelists since 1945. Yet, very few of these novels have been harshly criticized by either historians or other critics, Les Bienveillantes (2006) by Jonathan Littell and Jan Karski (2009) by Yannick Haenel being two notable exceptions. This article revisits the controversy between the novelist Yannick Haenel and the critic and film-maker Claude Lanzmann. First, it shows that the important questions raised by Lanzmann are not void of ambiguity, notably because key terms at the heart of this controversy (truth, fiction or even history) were used loosely. Second, this article compares the documentary Le Rapport Karski (2010) to other texts written by Karski and to the full transcription of the interview he gave to Lanzmann in 1978: it shows how Lanzmann's 2010 documentary distorts Karski's testimony to make it comply with historical perspectives that most historians would agree with today. Finally, the author of this article regrets that this controversy did not allow the debate to move beyond the military non-intervention of the Allies.

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A new pathway to (+)-inthomycin C is reported that exploits an O-directed free radical hydrostannation reaction on (−)-12 and a Stille cross-coupling as key steps. Significantly, the latter process was effected on 19 where a gauche-pentane repulsive interaction could interfere. Our stereochemical studies on the alkynol (−)-12 and the enyne (+)-7 confirm that Ryu and Hatakeyama’s (3S)-stereochemical revision of (+)-inthomycin C is invalid and that Zeeck and Taylor’s original (3R)-stereostructure for (+)-inthomycin C is correct.

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Abstract Image

Herein a new double O-directed free radical hydrostannation reaction is reported on the structurally complex dialkyldiyne 11. Through our use of a conformation-restraining acetal to help prevent stereocenter-compromising 1,5-H-atom abstraction reactions by vinyl radical intermediates, the two vinylstannanes of 10 were concurrently constructed with high stereocontrol using Ph3SnH/Et3B/O2. Distannane 10 was thereafter elaborated into the bis-vinyl iodide 9 via O-silylation and double I–Sn exchange; double Stille coupling of 9, O-desilylation, and oxidation thereafter furnished 8.