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Alcohols hemiacetals

There is yet another level of isomerism of sugars, because aldehydes (and ketones) form freely reversible adducts with alcohols (hemiacetals and hemiketals) in aqueous solutions. In the presence of... [Pg.166]

Fig. is. Range of substrates for the horse liver and Drosophila alcohol dehydrogenases (from left to right) secondary alcohols, primary alcohols, hemiacetals, and gem-diols. [Pg.474]

Glucose is a six-carbon aldohexose. The straight chain hexose structures can become cyclic. When aldehydes and ketones undergo reactions with alcohols, hemiacetals or hemiketals are formed. In aldohexoses, the eyclic structure is formed when the hydroxyl group in the fifth carbon reacts (nucleophilic addition) with the carbonyl carbon of the aldehyde group. The product formed is a hemiacetal. The cyclization is represented in Figure 29-4. [Pg.366]

In the presence of excess alcohol, hemiacetals react further to form acetals. RO RO... [Pg.262]

See other pages where Alcohols hemiacetals is mentioned: [Pg.2552]    [Pg.302]    [Pg.135]    [Pg.75]    [Pg.130]    [Pg.408]    [Pg.445]    [Pg.267]    [Pg.735]    [Pg.735]    [Pg.735]    [Pg.737]    [Pg.739]    [Pg.1202]    [Pg.71]    [Pg.509]    [Pg.150]    [Pg.744]    [Pg.745]    [Pg.747]    [Pg.749]    [Pg.777]   
See also in sourсe #XX -- [ Pg.735 ]

See also in sourсe #XX -- [ Pg.744 , Pg.747 ]



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Addition of Alcohols to Form Hemiacetals and Acetals

Addition of alcohols hemiacetal and acetal formation

Aldehydes can react with alcohols to form hemiacetals

Carbonyl compounds reaction with alcohols to form hemiacetal

Hemiacetal

Hemiacetalization

Hemiacetals formation from alcohols and aldehyde

Hemiacetals from alcohols + aldehydes

Hemiacetals from reaction of alcohols with aldehydes and ketones

Ketones and aldehydes, distinguishing from reaction with alcohols to form hemiacetal

Reactions of Hemiacetals or Hemiketals with Alcohols

The Addition of Alcohols Hemiacetals and Acetals

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