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Author: Subject: Dehydration of sugar alcohols
Boffis
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[*] posted on 30-7-2015 at 05:11
Dehydration of sugar alcohols


The dehydration and cyclotization of pentose sugars from corn and oat residues etc yields furfural (furan-2-carboxaldehyde). Do sugar alcohols react similarly? For instance does xylitol dehydrate to the equivalent furfurol or erythritol to 2-furanol (2-furanone) etc?

It appears that these comp[ounds are prepared industrially from furfural by various processes which seems to suggest that the direct dehydration to "ol" is not favorable.
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PHILOU Zrealone
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[*] posted on 31-7-2015 at 06:47


Cyclopentaring Methylol-furane (furfurol) is formed from xylitol but also possible cyclohexaring.
There are patents for converting biomass (wood) into biofuels...that explains this in details.

Theorically erythritol may lead to furan.

The dehydration of glycerol into accrolein and allylic alcohol are very interesting reactions but it becomes a nightmarre to extrapolate to erythritol, xylitol and mannitol/sorbitol :(.




PH Z (PHILOU Zrealone)

"Physic is all what never works; Chemistry is all what stinks and explodes!"-"Life that deadly disease, sexually transmitted."(W.Allen)
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