Der Komplex (I) bildet mit Mg eine (noch nicht näher untersuchte) Verbindung, die (ohne isoliert zu werden) mit Carbonylverbindungen zu Olefinen, wie (II) (cis‐/trans‐Gemisch) umgesetzt wird.
Saturated water solutions of selected alkaline and alkaline earth metal salts have been studied whether or not they catalyze the formation of levulinic acid from glucose. The most active was a solution of magnesium chloride. Activity was further increased in the system (MgCl2+H+).
We observed complete inhibition of this reaction by NO3−. Contrary to the generally accepted opinion that formation of hydroxymethylfurfural is only H+ catalyzed, we observed activity of the system formed from MgO and MgCl2 when one starts from glucose. (MgCl2+ MgO) in water is alkaline.
collected and analysed by g.1.c. with ether before g.1.c. analysis. with hydrogen. Yamamotol reported that in the presence of excess of Mg (Ti: Mg 1 : 10) the TiCl,*THF-Mg system reacts with H, giving MgH,. Our results indicate that MgH, is not the reducing agent. The origin of the hydrogen replacing halogen has not been elucidated. One source of
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