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Article(11)
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Monatshefte fur Chemie(3)
Amino Acids(2)
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European Journal of Organic Chemistry(1)
Heterocycles(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: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:scopusDomino 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:googlescopusHomologation of α-hydroxy acids to α-unsubstituted β-hydroxy carboxamides via Arndt-Eistert reaction
ArticleAbstract: Here we studied the homologation of leucic and phenyl lactic acid via Wolff-rearrangement of their dPalabras claves:Microwave shock-heating, α,β-Unsaturated carboxylic acids, α-Hydroxy diazoketones, β-Hydroxy carboxylic acidsAutores:Alberício F., Burger K., Jan Spengler, Ruíz-Rodríguez J.Fuentes:googlescopusSynthesis of partially fluorinated heterocycles from 4,4-bis(trifluoromethyl) substituted hetero-1,3-dienes via C-F bond activation and their application as trifluoromethyl substituted building blocks
ArticleAbstract: Bis(trifluoromethyl) substituted hetero-1,3-dienes can be transformed into partially fluorinated fivPalabras claves:Autores:Alberício F., Burger K., Hennig L., Jan SpenglerFuentes:scopus