-
groups may or may not be hydrogen. In a
hemiketal, both of
these R-groups must not be hydrogen. Thus,
hemiketals are
regarded as a
subclass of hemiacetals...
-
another carbohydrate. A
glycosidic bond is
formed between the
hemiacetal or
hemiketal group of a
saccharide (or a
molecule derived from a saccharide) and the...
- More
formally stated, then, an
anomer is an
epimer at the hemiacetal/
hemiketal carbon atom in a
cyclic saccharide.
Anomerization is the
process of conversion...
- workup, a
tertiary alcohol With an
alcohols or
alkoxides to
gives the
hemiketal or its
conjugate base. With a diol to the ketal. This
reaction is emplo****...
- one
bridging oxygen atom. The
resulting molecule has a
hemiacetal or
hemiketal group,
depending on
whether the
linear form was an
aldose or a ketose...
- with a
hydroxyl group on a
different carbon atom to form a
hemiacetal or
hemiketal,
forming a
heterocyclic ring with an
oxygen bridge between two carbon...
-
actual structure shown by
spectroscopic studies is the
result of
rapid hemiketal formation between the 6-OH and the 3-carbonyl groups.
Hydration of the...
-
studies of
warfarin show that it
exists in
tautomeric form, as the
cyclic hemiketal,
which is
formed from the 4-hydroxycoumarin and the
ketone in the 3-position...
- six-membered structure,
called β-d-fructopyranose,
owing to the
stability of its
hemiketal and
internal hydrogen-bonding. In solution,
fructose exists as an equilibrium...
-
group which is the
cyclic equivalent of a
hemiacetal (−CH(OH)O−) or a
hemiketal (>C(OH)O−). The
compound is
formed by the intramolecular, nucleophilic...
