Notiz über den Abbau der d‐Glucose zu 2‐Formyl‐d‐glycerinaldehyd mit Perjodsäure

Abstract

1571Dimeres Allen u n d Maleinsiiure-anhydrid: 22 g polymeres Allen') werden im Stickstoffstmm fraktioniert. Bei 62-68O geht das d i m e r e Allen als eine farblose Fliieeigkeit uber. D i m veriindert sich nicht weiter a n der Luft, wahrend die iibrigen Fraktionen sich innerhalb weniger Stunden verfkben und am anderen Tage bereits schwsrz sind. 0.5 g d i m e r e s Allen werden in 10 ccm Benzol gelost, mit 0.6 g Maleinsiiurea n h y

Selective catalytic conversion of biobased carbohydrates to formic acid using molecular oxygen

“…16 However, stoichiometric quantities of periodate are required and a large scale application of such chemistry is hardly imaginable. In 2002, Calvo and Vallejo reported the conversion of carbohydrate-based biomass to FA in supercritical water with hydrogen peroxide as additional reagent.…”

One-pot transformation of polysaccharides via multi-catalytic processes

“…It's well known that periodic acid is able to catalyze the oxidation of sugars into formic acid, but the selectivity is relatively low. 122,123 In turn, a vanadium-substituted Keggin-type polyoxometalate IJH 5 PV 2 Mo 10 O 40 ) was reported to be effective and selective for the conversion of biomass-based carbohydrates, with O 2 in water and in the absence of a base, giving formic acid as the only liquid phase product. 124 It was found that the yields or selectivities of formic acid were all ~50% for the oxidation of various substrates such as glucose, sorbitol, cellobiose, xylose and sucrose at 70-90 °C and an O 2 pressure of 30 bar, while the main by-product was CO 2 .…”

Notes: Ninhydrin Degradation of Hexosamines and Periodic Acid Oxidation of Hexoses

“…Spot tested at room temperature, the color formed was stable for more than 6 hr.-a positive indication of formaldehyde in the presence of other aliphatic aldehydes. 6 Alkaline resorcinol7 8reacted with the unknown yielding a yellow color which changed to red, giving an indication of formaldehyde.…”