Zobrazeno 1 - 10 of 55 pro vyhledávání: '"Fernando Walls"'
2
Enantioselective synthesis of α-hydroxy-β-amino acids from α-amino acids mediated by sulfoxides
Autor: Fernando Salgado, Eduardo Díaz, Rubén Sánchez-Obregón, Francisco Yuste, José L. García Ruano, Benjamín Ortiz, Fernando Walls
Publikováno v: Tetrahedron. 63:10521-10527
The synthesis of the optically pure (2 S ,3 S )- and (2 R ,3 S )-3-amino-2-hydroxybutanoic acids from commercially available ( S )-alanine derivatives is reported. The key step of the synthetic sequence is the conversion of γ-amino sulfoxides into
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f5c5a102551e7de868eee9e47dbe272b
https://doi.org/10.1016/j.tet.2007.07.072
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5
(±)-3,3-Diethoxycarbonyl-2-p-tolylsulfinylacrylonitrile as dienophile: relationship between the barrier for pyramidal inversion of vinyl sulfoxides and the electronic effects of the substituents at the double bond
Autor: Rubén Sánchez-Obregón, Francisco Yuste, Fernando Walls, José L. García Ruano, Angel Rodrı́guez-Hernández, J Israel Pérez, Benjamín Ortiz
Publikováno v: Tetrahedron. 58:2613-2620
The dienophilic behavior of (±)-3,3-diethoxycarbonyl-2- p -tolylsulfinylacrylonitrile ( 6 ) is reported and compared with that of trialkoxycarbonyl sulfinylethylene ( 3 ). The change of a CO 2 R group by a CN one increases both the reactivity and th
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f3e410e78c4e30c3e1bc4357f1d0bd99
https://doi.org/10.1016/s0040-4020(02)00149-7
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6
Synthesis of enantiomerically pure 2-amino alcohols from amino acids mediated by sulfoxides
Autor: Francisco Yuste, Jose Luis Garcia Ruano, Martha Peralta, Rubén Sánchez-Obregón, Fernando Walls, Benjamín Ortiz, Alejandra Carrasco, Leticia Quintero
Publikováno v: Tetrahedron: Asymmetry. 11:3079-3090
Enantiomerically pure (R1,S2)- and (S1,S2)-2-amino alcohols can be easily synthesized by stereodivergent reduction of α′-(N-Boc)amino β-keto sulfoxides (easily synthesized from readily available N-Boc amino ester hydrochlorides) with DIBAH (de 82
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d2e503dc4df0fb0c04f7073725f38141
https://doi.org/10.1016/s0957-4166(00)00264-0
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7
Asymmetric synthesis of α-acetylenic epoxides
Autor: Rubén Sánchez-Obregón, Francisco Yuste, Jose Luis Garcia Ruano, Fernando Walls, Benjamín Ortiz
Publikováno v: Tetrahedron: Asymmetry. 10:947-955
Chiral α-acetylenic oxiranes were easily synthesized from readily available propargylic esters by a four-step sequence involving the stereoselective reduction of α′-alkynyl β-keto sulfoxides with DIBAH (de 66–78%) and DIBAH/ZnBr2 (de 78–88%)
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3045426e7be895bbe004f4b54d48bb4e
https://doi.org/10.1016/s0957-4166(99)00079-8
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8
tert-Butyl (S)-N-[(S)-1-(oxiranyl)ethyl]carbamate
Autor: Benjamín Ortiz, Fernando Walls, Rubén Sánchez-Obregón, Rubén A. Toscano, Francisco Yuste
Publikováno v: Acta Crystallographica Section E Structure Reports Online. 62:o925-o927
The investigation of the title compound, C9H17NO3, which has two independent but virtually identical mol­ecules in the asymmetric unit, allowed the determination of the relative configurations of the chiral atoms as S.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::730dc11491de4efd8812fdc10ccd73c0
https://doi.org/10.1107/s1600536806003254
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