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  2. Hemiacetal - Wikipedia

    en.wikipedia.org/wiki/Hemiacetal

    In organic chemistry, a hemiacetal is a functional group the general formula R 1 R 2 C(OH)OR, where R 1, R 2 is a hydrogen atom or an organic substituent. They generally result from the nucleophilic addition of an alcohol (a compound with at least one hydroxy group ) to an aldehyde ( R−CH=O ) or a ketone ( R 2 C=O ) under acidic conditions.

  3. Pyranose - Wikipedia

    en.wikipedia.org/wiki/Pyranose

    This forms an intramolecular hemiacetal. If reaction is between the C-4 hydroxyl and the aldehyde, a furanose is formed instead. [ 1 ] The pyranose form is thermodynamically more stable than the furanose form, which can be seen by the distribution of these two cyclic forms in solution.

  4. Acetal - Wikipedia

    en.wikipedia.org/wiki/Acetal

    Generic structure of acetals. In organic chemistry, an acetal is a functional group with the connectivity R 2 C(OR') 2.Here, the R groups can be organic fragments (a carbon atom, with arbitrary other atoms attached to that) or hydrogen, while the R' groups must be organic fragments not hydrogen.

  5. Methoxymethanol - Wikipedia

    en.wikipedia.org/wiki/Methoxymethanol

    Methoxymethanol forms spontaneously when a water solution of formaldehyde and methanol are mixed. [3] [1] or when formaldehyde is bubbled through methanol.[4]In space methoxymethanol can form when methanol radicals (CH 2 OH or CH 3 O) react.

  6. Hemithioacetal - Wikipedia

    en.wikipedia.org/wiki/Hemithioacetal

    Hemithioacetal functional group. In organic chemistry, hemithioacetals (or thiohemiacetals) are organosulfur compounds with the general formula R−CH(−OH)−SR’.They are the sulfur analogues of the acetals, R−CH(−OH)−OR’, with an oxygen atom replaced by sulfur (as implied by the thio-prefix).

  7. Oligosaccharide nomenclature - Wikipedia

    en.wikipedia.org/wiki/Oligosaccharide_nomenclature

    An oligosaccharide has both a reducing and a non-reducing end. The reducing end of an oligosaccharide is the monosaccharide residue with hemiacetal functionality, thereby capable of reducing the Tollens’ reagent, while the non-reducing end is the monosaccharide residue in acetal form, thus incapable of reducing the Tollens’ reagent. [2]

  8. Fluoral - Wikipedia

    en.wikipedia.org/wiki/Fluoral

    It is commonly used in form of ethyl hemiacetal (1-ethoxy-2,2,2-trifluoroethanol, CF 3 CH(OCH 2 CH 3)(OH)) due to the aldehyde's high reactivity, including the tendency to polymerise. [ 5 ] Synthesis and reactions

  9. Schenck ene reaction - Wikipedia

    en.wikipedia.org/wiki/Schenck_ene_reaction

    Cis-3-hexenal is generated by conversion of linolenic acid to the hydroperoxide by the action of a lipoxygenase followed by the lyase-induced formation of the hemiacetal. [ 5 ] It must be noted, however, that this enzyme catalyzed path follows a different mechanism from the usual Schenck ene reaction.