Reaction C Sugar Dehydration

Furfural formation Various compounds can accelerate furfural formation for example, glycine accelerates both the conversion of xylose to furfural and 

Feather,54 in particular, has carried out some of these reactions in D20 or tritiated (radioactive) water, to study the extent of H exchange  

It therefore seems that Amadori compounds can undergo 1,2-enolisation much more easily and under milder acid conditions than the original sugar. 

Use of 1-14C has shown that the methyl group is derived from C-l of hexuronic acid or pentose.54 If prepared in D20, NMR shows hydrogen exchange from both C-2 and CH3. This accords with CH2 C(OH)... intermediates (on the 2,3-enolisation route). 

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Reaction C Sugar dehydration Reaction D Sugar fragmentation... 

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