9 resultados para Lytton, Henry A., 1865-1936.


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Fecha: 25-11-1944 (>1970 reproducción) / Unidad de instalación: Carpeta 25 - Expediente 23-6 / Nº de pág.: 1 (mecanografiada)

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F. García Jurado, R. González Delgado y M. González González (eds). Prólogo de J. C. Mainer.

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[EUS] 1936 arte egin ziren euskal liburu zaharren berrargitalpenak euren bereizgarrien arabera sailkatu ditugu, lehen hurbilketa modura. Gehienak tentuz erabiltzekoak dira, jatorrizko testuarekiko leialak ez diren heinean, baina bestalde datu jakingarriak eskaintzen dituzte garaian garaiko asmoez, joerez eta euskararen gaineko pentsamoldeaz.

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During the research that it is summarized in the present memory, the activation of enals via iminium ion catalysis in different transformations has been studied. Firstly, a 1,3-dipolar cycloaddition between stable azomethine ylides and a,b-unsaturated aldehydes catalyzed by a chiral imidazolidinone derivative has been optimized. Employing this methodology we have synthesized a large range of densely substituted pyrroloisoquinolines and pyrrolophthalazines with good yields and high values of diastereo- and enantioselectivity. Moreover, a mechanistic study has been carried out based on DFT calculations and experimental data which have allowed us to propose that the (3+2) cycloaddition reaction follows a sequential Michael addition/Mannich cyclization pathway. The formation of the iminium ion as a result of the condensation between the a,b-unsaturated aldehyde and the catalyst plays an essential role, regarding both reactivity and stereoselectivity. On the other hand we have developed a methodology to carry out a cascade Michael/Henry reaction followed by a sequential dehydration. Starting from simple substrates (2-nitromethylacrilates and a,b-unsaturated aldehydes) and employing a prolinol-derivative catalyst a series of quiral nitrocyclohexadienes have been synthesized.

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7 cartas (mecanografiadas y manuscritas) ; entre 180x130mm y 214x139mm. Ubicación: Caja 1 - Carpeta 82

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Historia de la influencia del higienismo en la evolución del espacio escolar de la ciudad de Vitoria entre 1865-1931.

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Ed. by Xabier Artiagoitia, Patxi Goenaga & Joseba A. Lakarra.

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[es]organización del trabajo en la industria del automovil en el s. XX.