Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Nativitat Valls"'
Publikováno v:
ARKIVOC, Vol 2007, Iss 4, Pp 320-330 (2006)
Externí odkaz:
https://doaj.org/article/1253d599d2ce4172a11f63e9f4fc88de
Publikováno v:
Tetrahedron: Asymmetry. 19:2130-2134
Fischer indolization of enantiopure 2-methoxycarbonyl-cis-octahydroindol-6-ones using AcOH as a catalyst induces racemization of the octahydropyrrolocarbazoles obtained. Conversely, when using TsOH, the α-amino ester moiety preserves its configurati
Publikováno v:
ARKIVOC, Vol 2007, Iss 4, Pp 320-330 (2006)
Scopus-Elsevier
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Palladiumand radical-mediated cyclizations from N-(2-bromoprop-2-enyl)-1azaspiro[4.5]decanes were studied, leading to the formation of azatricyclic derivatives embodying 7,10a-methanopyrrolo[1,2-a]azocine or a pyrrolo[2,3-i]indole framework depending
Publikováno v:
Tetrahedron. 62:9166-9173
Birch reduction of homotyramines with a syn-β-amino alcohol unit followed by acid treatment of formed dihydroanisole derivatives gives polysubstituted enantiopure cis-decahydroquinolines. The stereoselectivity of the process differs if the hydroxyl
Publikováno v:
Tetrahedron Letters. 47:3701-3705
The first syntheses of (2S,3R)- and (2S,3S)-3-chloroleucine (3-chloro- d -leucines 1 and 2) have been achieved from d -3-hydroxyleucine and allo- d -3-hydroxyleucine, respectively, through the formation of the corresponding N-Cbz β-lactones, followe
Publikováno v:
Tetrahedron: Asymmetry. 14:1241-1244
The synthesis of enantiomerically pure α-amino acid (2 S ,3a S ,6 R ,7a S )-2-carboxy-6-chlorooctahydroindole ( l -Ccoi) is described. NMR data of l -Ccoi 3 are very different from those reported for the azabicyclic core of aeruginosins 205, indicat
Publikováno v:
The Journal of Organic Chemistry. 67:4945-4950
The first total synthesis of aquatic peptide microcin SF608 is described. Coupling of L-Hpla with the dipeptide L-Phe-L-Choi followed by coupling with agmatine and a deprotection step gave microcin SF608. In addition, the levorotatory character of L-
Autor:
Meritxell López-Canet, Joan-Carles Fernàndez, Josep Bonjoch, Nativitat Valls, Juanlo Catena, D. Terricabras
Publikováno v:
Tetrahedron: Asymmetry. 8:3143-3151
A diastereoselective synthesis of (−)-2-ethyloctahydroindol-6-one 12 starting from O- methyl- L -tyrosine 1 is described. The process first involves the synthesis of enantiopure (−)-1-(4-methoxyphenyl)-2-butylamine 8 , which, after Birch reductio
Publikováno v:
Tetrahedron. 53:9407-9414
The isomerization-cyclization of tetrahydropyridine 7 by AcOH leads to 4-ethyloctahydroindolo[2,3-a]quinolizine-2-carbaldehydes (8). When the process is carried out with aqueous AcOH, indolizidinoindole 9 is formed as a by-product in a competitive wa
Publikováno v:
Tetrahedron: Asymmetry. 7:1899-1902
The first synthesis of 6-hydroxyoctahydroindole-2-carboxylic acid derivatives with a cis fusion in the azabicyclic nucleus is described. The synthesis involves a Birch reduction of O -methyl-L-tyrosine followed by an aminocyclization in acid medium t