Mostrando 10 resultados de: 16
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Publisher
European Journal of Organic Chemistry(3)
Monatshefte fur Chemie(3)
Amino Acids(2)
Synthesis(2)
Current Organic Synthesis(1)
Asymmetric pictet-spengler reactions: Synthesis of 1,2,3,4-tetrahydroisoquinoline carboxylic acid (Tic) chimeras
ArticleAbstract: A preparatively simple diastereoselective synthesis of the amino acid chimera (1S,3S)-1,2,3,4-tetrahPalabras claves:amino acids, Cyclizations, Diastereoselectivity, heterocycles, QuinolinesAutores:Broxterman Q.B., Burger K., Duchateau A.L.L., Jan Spengler, Quaedflieg P.J.L.M., Schedel H., Sieler J.Fuentes:googlescopusAsymmetric synthesis of α-unsubstituted β-hydroxy acids
ReviewAbstract: α-Unsubstituted β-hydroxy acid (3-hydroxycarboxylic acids) are constituents of various natural produPalabras claves:3-hydroxycarboxylic acids, Arndt-Eister homologation, Asymmetric aldol reactions, Asymmetric reduction, Cyclic sulfates, Cyclic sulfites, Reductive cleavage, Reformatsky reactions, β-lactonesAutores:Alberício F., Jan SpenglerFuentes:googlescopusA new approach to N-methylaspartic, N-methylglutamic, and N-methyl-α- aminoadipic acid derivatives
ArticleAbstract: N-Methylaspartic acid derivatives and its homologues are obtained by a stereoconservative one-pot prPalabras claves:Hexafluoroacetone, N-Methyl- α-aminoadipic acid, N-Methylaspartic acid, N-Methylglutamic acid, N-Methylthiazol-4-yl-α-amino acidsAutores:Burger K., Jan SpenglerFuentes:scopusCysteine-S-trityl a key derivative to prepare N-methyl cysteines
ArticleAbstract: S-Trt Cys are used as precursors for the synthesis of protected NMe-Cys. N-Methylation of Alloc-Cys(Palabras claves:Autores:Alberício F., Bayó-Puxan N., Jan Spengler, Marcucci E., Tulla-Puche J.Fuentes:googlescopusDomino reactions with fluorinated five-membered heterocycles - Syntheses of trifluoromethyl substituted butenolides and γ-ketoacids
ArticleAbstract: A new approach to trifluoromethyl substituted butenolides and their thioanalogues is described startPalabras claves:2-Fluoro-3-trifluoromethylfurans, 2-Fluoro-3-trifluoromethylthiophenes, Domino reactions, Trifluoromethyl substituted butenolides, α-Trifluoromethyl-γ-keto acidsAutores:Alberício F., Burger K., Fuchs A., Greif D., Hennig L., Jan SpenglerFuentes:googlescopusDomino reactions with fluorinated five-membered heterocycles. α-Trifluoromethyl α-amino acids with unsaturated side-chains
ArticleAbstract: α-Trifluoromethyl α-amino acids with unsaturated side-chains have been prepared from 5-fluoro-4-trifPalabras claves:5-Fluoro-4-trifluoromethyloxazoles, Allyl alcohols, Claisen rearrangement, Farnesol, Geraniol, nucleophilic aromatic substitution, Propargyl alcohols, secondary structure, α-Trifluoromethyl α-amino acidsAutores:Alberício F., Burger K., Hennig L., Jan Spengler, Koksch B., Tsouker P.Fuentes:googlescopusHexafluoroacetone as a protecting and activating reagent. N- and O-glycosylation of isoserine and isocysteine *
ArticleAbstract: Starting from HFA-protected malic and thiomalic acid a series of O- and N-glycoconjugates suitable fPalabras claves:Glycoconjugates, Glycosylamines, Hexafluoroacetone, Isocyanates, malic acid, Thiomalic acidAutores:Alberício F., Böttcher C., Burger K., Hennig L., Jan SpenglerFuentes:googlescopusHexafluoroacetone as a protecting and activating reagent. Regioselective esterification of aspartic, malic, and thiomalic acid
ArticleAbstract: Hexafluoroacetone reacts with α-functionalized α,β- dicarboxy acids like aspartic, malic, and thiomaPalabras claves:Branched depsipeptides, Branched peptides, Hexafluoroacetone, Peptidomimetics, polyesterAutores:Alberício F., Burger K., Jan Spengler, Pumpor K., Windeisen E.Fuentes:googlescopusHexafluoroacetone as a protecting and activating reagent: Synthesis of new types of fluoro-substituted α-amino, α-hydroxy and α-mercapto acids
ArticleAbstract: Starting from (S)-aspartic, (S)-malic, (S)-citramalic and (S,R)-thiomalic acid, new types of 4,4-difPalabras claves:amino acids, Fluorine, Hydroxy acids, Mercapto acids, PeptidesAutores:Berger S., Burger K., El-Kousy S.M., Hennig L., Jan Spengler, Koksch B., Lange T., Osipov S.N., Tsouker P.Fuentes:googlescopusHexafluoroacetone as protecting and activating reagent: Reactions of hexafluoroacetone with α-keto acids
ArticleAbstract: Hexafluoroacetone and α-keto acids react to give 5,5-bis(trifluoromethyl) substituted 2(5H)-furanonePalabras claves:2,2-Bis(trifluoromethyl)-1,3-dioxolan-4-ones, 5,5-Bis(trifluoromethyl)-2(5H)-furanones, 5-Trifluoromethyl-2(5H)-furanones, Butenolides, Hexafluoroacetone, Zymonic acid, α-Keto acidsAutores:Burger K., Haas A., Heistracher E., Jan Spengler, Osipov S.N.Fuentes:googlescopus