hemiketal

hem·i·ke·tal

(hem'ē-kē'tăl), RC(R')(OH)OR", a product of the addition of an alcohol to a ketone. In the ketose sugars, the hemiketal formation is from an attack by an internal OH on the ketone carbonyl leading to intramolecular cyclization (furanose or pyranose); the hemiketal forms of the sugars are involved in polysaccharide formation, as glycosyls or glycosides.
See also: hemiacetal, ketal.

hem·i·ke·tal

(hem'ē-kē'tăl) A product of the addition of an alcohol to a ketone. In the ketose sugars, the hemiketal formation is from an attack by an internal OH on the ketone carbonyl leading to intramolecular cyclization (furanose or pyranose); the hemiketal forms of the sugars are involved in polysaccharide formation, as glycosyls or glycosides.
See also: hemiacetal, ketal

单词	hemiketal
释义	DictionarySeehemiacetal hemiketal hemiketal [¦he·mē′ked·əl] (organic chemistry) A carbonyl compound that results from the addition of an alcohol to the carbonyl group of a ketone, with the general formula (R)(R′)C(OH)(OR). hemiketal hem·i·ke·tal (hem'ē-kē'tăl), RC(R')(OH)OR", a product of the addition of an alcohol to a ketone. In the ketose sugars, the hemiketal formation is from an attack by an internal OH on the ketone carbonyl leading to intramolecular cyclization (furanose or pyranose); the hemiketal forms of the sugars are involved in polysaccharide formation, as glycosyls or glycosides. See also: hemiacetal, ketal. hem·i·ke·tal (hem'ē-kē'tăl) A product of the addition of an alcohol to a ketone. In the ketose sugars, the hemiketal formation is from an attack by an internal OH on the ketone carbonyl leading to intramolecular cyclization (furanose or pyranose); the hemiketal forms of the sugars are involved in polysaccharide formation, as glycosyls or glycosides. See also: hemiacetal, ketal
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