Vendeur : BuchWeltWeit Ludwig Meier e.K., Bergisch Gladbach, Allemagne
Taschenbuch. Etat : Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -In a few simple steps starting from a commercially available reagents benzyl chloride and potassium thiocyanate, thiocyanate is obtained which is directly reacted with glycine amide to give benzyl thiourea. The used of concentrated HCl give the ring closed product of the latter. The alkylation of 3-benzyl-2- thioxoimidazolidin-4-one is made by the used of methyl iodide under basic condition. Subsequent treatment of the alkyl derivative 3-benzyl-2-(methylthio)-3,5dihydro-4-imidazole with diethyl phosphono cyanate gives the nitrile derivatives which upon treatment with sulphuric acid and functional group manipulations gave 1-benzyl-5-chloromethylimidazolium chloride. This compound is converted mildly under O'Donnell conditions into the l- Histidine derivative. After deprotection L-Histidine is obtained in good yield with 99% enantiomeric excess. This synthetic scheme allows access to any isotopomer of L-histidine and many other biologically important imidazole derivatives. 120 pp. Englisch. N° de réf. du vendeur 9786139984787
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Vendeur : Books Puddle, New York, NY, Etats-Unis
Etat : New. N° de réf. du vendeur 26375788152
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Vendeur : moluna, Greven, Allemagne
Kartoniert / Broschiert. Etat : New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Autor/Autorin: Talab SarraAssistant professor Organic chemistry,Chemistry Department, Collage of Science, Al Imam Mohammad Ibn Saud Isalmic University Riyadh Saudi ArabiaIn a few simple steps starting from a commercially available reagents benz. N° de réf. du vendeur 262663834
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Vendeur : Majestic Books, Hounslow, Royaume-Uni
Etat : New. Print on Demand. N° de réf. du vendeur 370257319
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Vendeur : Biblios, Frankfurt am main, HESSE, Allemagne
Etat : New. PRINT ON DEMAND. N° de réf. du vendeur 18375788146
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Vendeur : buchversandmimpf2000, Emtmannsberg, BAYE, Allemagne
Taschenbuch. Etat : Neu. This item is printed on demand - Print on Demand Titel. Neuware -In a few simple steps starting from a commercially available reagents benzyl chloride and potassium thiocyanate, thiocyanate is obtained which is directly reacted with glycine amide to give benzyl thiourea. The used of concentrated HCl give the ring closed product of the latter. The alkylation of 3-benzyl-2- thioxoimidazolidin-4-one is made by the used of methyl iodide under basic condition. Subsequent treatment of the alkyl derivative 3-benzyl-2-(methylthio)-3,5dihydro-4-imidazole with diethyl phosphono cyanate gives the nitrile derivatives which upon treatment with sulphuric acid and functional group manipulations gave 1-benzyl-5-chloromethylimidazolium chloride. This compound is converted mildly under O¿Donnell conditions into the l- Histidine derivative. After deprotection L-Histidine is obtained in good yield with 99% enantiomeric excess. This synthetic scheme allows access to any isotopomer of L-histidine and many other biologically important imidazole derivatives.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 120 pp. Englisch. N° de réf. du vendeur 9786139984787
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Vendeur : AHA-BUCH GmbH, Einbeck, Allemagne
Taschenbuch. Etat : Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - In a few simple steps starting from a commercially available reagents benzyl chloride and potassium thiocyanate, thiocyanate is obtained which is directly reacted with glycine amide to give benzyl thiourea. The used of concentrated HCl give the ring closed product of the latter. The alkylation of 3-benzyl-2- thioxoimidazolidin-4-one is made by the used of methyl iodide under basic condition. Subsequent treatment of the alkyl derivative 3-benzyl-2-(methylthio)-3,5dihydro-4-imidazole with diethyl phosphono cyanate gives the nitrile derivatives which upon treatment with sulphuric acid and functional group manipulations gave 1-benzyl-5-chloromethylimidazolium chloride. This compound is converted mildly under O'Donnell conditions into the l- Histidine derivative. After deprotection L-Histidine is obtained in good yield with 99% enantiomeric excess. This synthetic scheme allows access to any isotopomer of L-histidine and many other biologically important imidazole derivatives. N° de réf. du vendeur 9786139984787
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Vendeur : preigu, Osnabrück, Allemagne
Taschenbuch. Etat : Neu. A Novel Synthesis Of Isotopically Labelled L-Histidine | Sarra Talab | Taschenbuch | 120 S. | Englisch | 2019 | LAP LAMBERT Academic Publishing | EAN 9786139984787 | Verantwortliche Person für die EU: BoD - Books on Demand, In de Tarpen 42, 22848 Norderstedt, info[at]bod[dot]de | Anbieter: preigu. N° de réf. du vendeur 115183273
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Vendeur : Buchpark, Trebbin, Allemagne
Etat : Hervorragend. Zustand: Hervorragend | Sprache: Englisch | Produktart: Bücher | In a few simple steps starting from a commercially available reagents benzyl chloride and potassium thiocyanate, thiocyanate is obtained which is directly reacted with glycine amide to give benzyl thiourea. The used of concentrated HCl give the ring closed product of the latter. The alkylation of 3-benzyl-2- thioxoimidazolidin-4-one is made by the used of methyl iodide under basic condition. Subsequent treatment of the alkyl derivative 3-benzyl-2-(methylthio)-3,5dihydro-4-imidazole with diethyl phosphono cyanate gives the nitrile derivatives which upon treatment with sulphuric acid and functional group manipulations gave 1-benzyl-5-chloromethylimidazolium chloride. This compound is converted mildly under O¿Donnell conditions into the l- Histidine derivative. After deprotection L-Histidine is obtained in good yield with 99% enantiomeric excess. This synthetic scheme allows access to any isotopomer of L-histidine and many other biologically important imidazole derivatives. N° de réf. du vendeur 33397896/1
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