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DOI: 10.1055/s-2003-40519
Synthesis of Enantiomers of Butane-1,2-diacetal-Protected Glyceraldehyde and of (R,R)-Butane-1,2-diacetal-Protected Glycolic Acid
Publikationsverlauf
Publikationsdatum:
08. Juli 2003 (online)

Abstract
A convenient and scalable synthesis of enantiomers of butane-2,3-diacetal-protected glyceraldehyde was accomplished from d-mannitol and l-ascorbic acid, respectively. The R-aldehyde was additionally converted to the (R,R)-butane-2,3-diacetal glycolic acid building block 1.
Key words
diacetal - glyceraldehydes - α-hydroxy acid - d-mannitol - l-ascorbic acid
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References
[α]D of this aldehyde in CHCl3 is not reliable because the value increases from -110 to -160 in two hours possibly due to an acid-catalysed decomposition. Nevertheless, the enantiomeric excess of 1 determined by chiral GC proved that the enantiomeric excess of 6 is at least 99%.