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Domino 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: 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:googlescopusOrthogonally protected, carboxy-activated L-homoisoserine, 2-methyl-L-homoisoserine, and homoisocysteine derivatives. New building blocks for peptide and depsipeptide modification
ArticleAbstract: Starting from L-malic, L-citramalic, and rac. thiomalic acids routes to L-homoisoserine, 2-methyl-L-Palabras claves:Arndt-Eistert reaction, Azapeptides, Citramalic acid, Curtius rearrangement, Depsipeptide modification, Hexafluoroacetone, malic acid, Peptide modification, Thiomalic acid, Wolff rearrangement, α-Hydroxy acids, α-Mercapto acids, γ-Amino acidsAutores:Alberício F., Böttcher C., Burger K., Hennig L., Jan Spengler, Radics G.Fuentes:googlescopusPartially fluorinated heterocycles from 4,4-bis(trifluoromethyl)-hetero-1, 3-dienes via C-F bond activation - Synthesis of 2-fluoro-3-(trifluoromethyl) furans
ArticleAbstract: An efficient synthesis of 2-fluoro-3-(trifluoromethyl)furans was developed. Keystep of the reactionPalabras claves:1-Aryl-4,4-difluoro-3- (trifluoromethyl)but-3-en-1-ones, 3-(Trifluoromethyl)tetrahydrocumaron, Bridged 3-(trifluoromethyl)furans, C-F Bond activation, [4 + 1] CycloadditionAutores:Alberício F., Burger K., Fuchs A., Helmreich B., Hennig L., Jan SpenglerFuentes:scopusSynthesis of derivatives of ω-isocyanato-α-methylamino, ω-ureido-α-methylamino, and N<sup>α</sup>-methyl-α,ω-diamino acids
ArticleAbstract: Homochiral Nα-methyl-2,3-diaminopropionic and Nα-methyl-2,4-diaminobutyric acid derivatives 8a,b werPalabras claves:3-Methylaminopyrrolidin-2-ones, Hexafluoroacetone, N -Methyl-2,3-diaminopropionic acid derivatives and homologues α, ω-Isocyanato-α-methylamino acid derivatives, ω-Ureido-α-methylamino acidsAutores:Burger K., Essawy S.A., Hennig L., Herzschuh R., Jan SpenglerFuentes: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:scopusSynthesis of α-trifluoromethyl α-amino acids with aromatic, heteroaromatic and ferrocenyl subunits in the side chain
ArticleAbstract: 5-Benzyloxy-4-trifluoromethyl-1,3-oxazoles, obtained from 5-fluoro-4-trifluoromethyloxazoles and benPalabras claves:1,3-Benzyl group migration versus Claisen rearrangement, 5-Fluoro-4-trifluoromethyl-1,3-oxazoles, Nucleophilic heteroaromatic substitution, Synthetic Tfm-Gly equivalent, α-Trifluoromethylamino acidsAutores:Alberício F., Burger K., Hennig L., Jan Spengler, Koksch B., Tsouker P.Fuentes:googlescopus