Utilisation d'ylides du phosphore non stabilisés en chimie des sucres. V. Sucres ramifiés dérivés du méthyl α‐D‐lyxo‐hexopyrannosul‐4‐oside. Communication préliminaire

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Abstract
Cis and trans‐methyl‐4‐deoxy‐2, 3‐O‐isopropylidene‐6‐O‐methyl‐4‐methylthio‐methylene‐α‐D‐lyxo‐hexopyra‐nosides are prepared by a Wittig reaction. Methods are described for the determination of the configuration of the geometrical isomers whose Raney‐Nickel reduction leads to derivatives of 4‐deoxy‐4‐methyl‐hexoses of the D‐manno and D‐talo series.