CH1012
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L1 /
9
STRUCTURES II
Fischer Haworth
aldose hemiacetal
•
• The cyclic
hemiacetal form is drawn
with the anomeric C & the hemiacetal O
(of the new
C-O bond)
at the RHS.
with the anomeric C & the hemiacetal O
(of the new
C-O bond)
at the RHS.
hemiacetal
O
anomeric C
anomeric C
In solution the monosaccharides exist
mainly in cyclic hemiacetal forms where the
penultimate -OH bonds with the C=O, an
intramolecular nucleophilic addition reaction.
mainly in cyclic hemiacetal forms where the
penultimate -OH bonds with the C=O, an
intramolecular nucleophilic addition reaction.
