ChemInform Abstract: REACTIONS OF NITRO SUGARS PART 34, KOENIGS‐KNORR SYNTHESES OF SOME ALPHA‐1‐2 AND BETA‐1‐2 LINKED NITRO DISACCHARIDES

Hans H. Baer; Jean Mj Frechet; Ursula J. Williams

doi:10.1002/chin.197452459

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ChemInform Abstract: REACTIONS OF NITRO SUGARS PART 34, KOENIGS‐KNORR SYNTHESES OF SOME ALPHA‐1‐2 AND BETA‐1‐2 LINKED NITRO DISACCHARIDES

Article 1974 de

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Abstract Die K0enigs‐Knorr‐Kondensation (Helferich‐Modifikation) des α‐Glucosylpyranosylbromides (I) mit den anomeren galacto‐Nitrozuckern (IIa) bzw. (IIb) liefert die Disaccharide (IIIa) bzw. (IIIb); mit den gluco‐Nitrozuckern (IVa) bzw. (IVb) werden jeweils Gemische der α‐ (vorherrschender Anteil) und β‐glykosidisch verknüpften Disaccharide erhalten: a) Das Produktgemisch (Va) ist schwertrennbar; b) im Falle der Reaktion von (I) mit (IVb) kann nur das α‐verknüpfte Produkt (Vb) isoliert werden.

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ChemInform Abstract: REACTIONS OF NITRO SUGARS PART 34, KOENIGS‐KNORR SYNTHESES OF SOME ALPHA‐1‐2 AND BETA‐1‐2 LINKED NITRO DISACCHARIDES

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