Allose

6 - (hydroxymethyl) -2 ,3,4,5- tetrol Oxane

  • 2595-97-3 (D - allose )
  • 7635-11-2 (L- allose )

White solid

Fixed

143-146 ° C

Partially in water

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The allose is one of the monosaccharides ( simple sugars, a subset of carbohydrates). Allose is a hexose, which means it has six carbon atoms. She has like all hexoses the sum formula C6H12O6. Is stereoisomerically for glucose and is part of the subset of the aldohexoses, reducing the " aldehyde sugars ".

The assignment to the D-form ( dexter: right ) or L-form ( laevus: left) is done on the arrangement of the secondary OH group in the Fischer projection at the chiral carbon atom No. 5

Properties

In aqueous solution it is partly to an intramolecular ring closure so that an equilibrium between the aldehyde and the two ring forms ( furanose form and pyranose form ), the allose then present almost exclusively in the pyranose form:

CAS registry number Haworth projection
50244
de