Mostrando 5 resultados de: 5
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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 protection/activation strategy for the synthesis of naturally occurring and non-natural α-N-alkylamino acids
ReviewAbstract: A new method for the preparation of N-methylamino acids and some of their derivatives starting fromPalabras claves:amino acids, Hexafluoroacetone, Pro-Glu-chimeras, Pro-Tau-chimeras, α-N-methylamino acids, α-N-phosphinoylmethylamino acidsAutores:Burger K., Jan Spengler, Schedel H.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:googlescopusSynthesis of all the diastereomers of 2-amino-3-hydroxy-4,5- dimethylhexanoic acid
ArticleAbstract: Herein, we describe an efficient stereoselective synthesis of all the diastereomers of 2-amino-3-hydPalabras claves:amino acids, Asymmetric synthesis, Cyclization, hydrogenationAutores:Alberício F., Jan SpenglerFuentes:scopusSynthesis of orthogonally protected l-threo-β-ethoxyasparagine
ArticleAbstract: Orthogonally protected l-threo-β-ethoxyasparagine (Fmoc-EtOAsn(Trt)- OH, 1) was synthesized from diePalabras claves:2,4,6-Trimethoxybenzylamide, amino acids, Hexafluoroacetone, peptide, TritylamideAutores:Alberício F., Jan Spengler, Pelay M., Tulla-Puche J.Fuentes:googlescopus