Výsledky vyhledávání - "Ripa, Alberto"

α-t-Butyl- and α-i-Propyl-ortho-hydroxybenzylamines: Racemic Synthesis/Resolution and Asymmetric Synthesis

Autor: Bernardinelli, Gérald Hugues, Fernandez, Daniel, Gosmini, Romain, Meier, Peter, Ripa, Alberto, Schüpfer, Patrick, Treptow, Bjorn Klaus, Kundig, Ernst Peter

Publikováno v: Chirality, Vol. 12, No 5-6 (2000) pp. 529-539

Efficient routes to α-tert-butyl- and α-iso-propyl-ortho-hydroxybenzylamines 1a and 1b are described. Highly enantioenriched 1a and 1b were obtained by resolution of the methoxy derivatives 2 by recrystallization of the salts formed with mandelic a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______1400::019e32f6503fa5f6cc1d8ad4a7073883
https://archive-ouverte.unige.ch/unige:7777

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1,2-Disubstituted [(η6-Arene)Cr(CO)>3>] Complexes by Sequential Nucleophilic Addition/endo-Hydride Abstraction

Autor: Fretzen, Angelika, Ripa, Alberto, Liu, Rong-Ming, Bernardinelli, Gérald Hugues, Kundig, Ernst Peter

Publikováno v: Chemistry-A European Journal, Vol. 4, No 2 (1998) pp. 251-259

The surprising answer to the question Are the structural characteristics of the product of the nucleophilic addition to complex 1 those of a cyclohexadienyl complex (2 a) or those of a diene aza-enolate complex (2 b)? is: both. This is indicated by t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______1400::ec804c8f7b5952fda4283d7d5df9d2bd
https://archive-ouverte.unige.ch/unige:7764

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A New Asymmetric Synthesis of Tricarbonylchromium Complexes of ortho-Substituted Benzaldehydes

Autor: Kundig, Ernst Peter, Liu, Rong-Ming, Ripa, Alberto

Publikováno v: Helvetica Chimica Acta, Vol. 75, No 8 (1992) pp. 2657-2660

ortho-Substituted [Cr(CO)₃(benzaldehyde)] complexes are obtained via nucleophilic addition of alkyl- and aryllithium reagents to a [Cr(CO)₃(phenylmethaneimine)] complex followed by endo-hydride abstraction with triphenylmethyl cation. This sequen

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______1400::d9258debf0ea57a337e4f1ee265ca8e9
https://archive-ouverte.unige.ch/unige:6225

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