Die Hydrolyse des α‐Methyl‐galakto‐septanosides (III. Mitteil, über Septanose‐Derivate1)

Gas Chromatographic Determination of the Carbonyl Forms of Sugars.

“…To date it was not possible to prove the existence of these rings in solution. The results were confirmed by synthesis of 2,3,4,5tetramethyl-D-galaetosides (8,9) yielding the same retention behavior on packed and on capillary columns.…”

“…These two substances were identified as the ß-and a-septanosides, sugars with seven-membered-ring structures. It has been predicted (9) that glycosides having a (l,6)-ring should have the same order of stability as furanosides. To date it was not possible to prove the existence of these rings in solution.…”