Alternatively, if the hydroxyl attacks a ketone to produce a hemiketal, the resultant product is a 5-membered ring called a ketose, or furanose. Another convention to note is ‘D- ‘and ‘L- ‘.

More information: Scot M. Sutton et al, Abiotic aldol reactions of formaldehyde with ketoses and aldoses—Implications for the prebiotic synthesis of sugars by the formose reaction, Chem (2025 ...

Ketose 3-epimerase: An enzyme that catalyses the interconversion of ketose sugars, pivotal for synthesising rare sugars such as D-allulose. D-allulose: A rare sugar and C-3 epimer of D-fructose, ...

Scientists have demonstrated an alternative pathway to life-essential sugars called the glyoxylate scenario, which may push the field of pre-life chemistry past the formose reaction hurdle.

Non Reducing Sugars: Those sugar which fail to reduce Tollen’s reagent are called non reducing sugar. Reaction with Phenylhydrazine: Both glucose and fructose react with phenylhydrazine whose ...

Abiotic aldol reactions of formaldehyde with ketoses and aldoses—Implications for the prebiotic synthesis of sugars by the formose reaction Article Publication Date 23-Apr-2025 ...