14 resultados para João Manuel dos Santos Cunha
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[EN] The main goal of this study is to analyze how organizational commitment has a mediating effect on the relation between transformational leadership and organizational trust. Therefore we developed an organization analysis based on a survey that was used to collect primary data from a sample of 58 employees. We obtained a 71% response rate and these data were analyzed using quantitative methodological techniques and linear regression. The research was conducted at the Serralves Foundation (Porto, Portugal) to empirically test the proposed research model and its hypotheses. The empirical results confirm that transformational leadership positively enhances organizational trust. However, transformational leadership and organizational trust are not significantly influenced by organizational commitment, thus not having a mediating effect on this relationship. Such results assume particular relevance because they become a basis for comparative studies in similar organizations. This study brings some theoretical contributions to the literature by analyzing the mediating effect of organizational commitment on the relation between transformational leadership and organizational trust in cultural organizations and has also some practical management implications, as it draws attention to the importance of a set of practices, job satisfaction oriented, which can effectively lead to organizational commitment intervention in the relationship between transformational leadership and organizational trust.
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Fecha: 15-3-1935 (>1970 reproducción) / Unidad de instalación: Carpeta 25 - Expediente 23-2 / Nº de pág.: 1 (mecanografiada)
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Fecha: 29-9-1947 / Unidad de instalación: Carpeta 25 - Expediente 23-4 / Nº de pág.: 1 (mecanografiada)
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Fecha: 29-12-1937 original (>1970 copia) / Unidad de instalación: Carpeta 48 - Expediente 8-9 / Nº de pág.: 3 (mecanografiadas)
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Fecha: 1974 / Unidad de instalación: Carpeta 48 - Expediente 8-6 / Nº de pág.: 3 (mecanografiadas)
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Fecha: 21-3-1940 (>1970 copia) / Unidad de instalación: Carpeta 45 - Expediente 2-14 / Nº de pág.: 4 (mecanografiadas)
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Dedicated to Prof. Julio Alvarez-Builla on the occasion of his 65th anniversary.
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Issue in Honor of Prof. Paweł Kafarski
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11 p.
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Juan Manuel Abascal Palazón, Antonio Caballos Rufino, Santiago Castellanos Garcia y Juan Santos Yanguas (eds.)
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[EN] The purpose of this review article is to illustrate synthetic aspects of functionalized phosphorus derivatives containing an oximo moiety at the beta-position. First section will be focused on the synthesis of phosphine oxides, phosphonates or phosphonium salts containing an oxime group. The synthesis of these derivatives comprises the carbon–phosphorus single bond construction by reaction of haloximes with phosphorus derivatives, nucleophilic addition of phosphorus reagents to carbonyl compounds, or nucleophilic addition of phosphorus reagents to nitro olefins. This section will also concentrate on the most practical routes for the synthesis of the target compounds, through carbon–nitrogen double bond formation, which are as follows: condensation processes of carbonyl compounds and hydroxylamine derivatives or addition of hydroxylamines to allenes or alkynes. The preparative use of beta-oximo phosphorus derivatives as synthetic intermediates will be discussed in a second section, comprising olefination reaction, oxidation of oximes to nitrile oxides by reaction at the C-N double bond of the oxime moiety, oxidation of these substrates to nitrosoalkenes, reduction to the corresponding hydroxylamines and some reactions at the hydroxyl group of the hydroxyimino moiety.
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[EN] A review focused on recent advances in intramolecular aza-Wittig reaction of phosphazenes with several carbonyl or analogous compounds is reported. Phosphazenes afford intramolecular aza-Wittig reaction with different groups within the molecule as aldehydes, ketones, esters, thioesters, amides, anhydrides and sulfimides. One of the most important applications of this reaction is the synthesis of a wide range of heterocyclic compounds, ranging from simple monocyclic compounds to complex polycyclic and macrocyclic systems.
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4 cartas (manuscritas) ; entre 210x260mm y 150x200mm