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In carbohydrate chemistry carbohydrate acetalisation is an organic reaction and a very effective means of providing a protecting group. The example below depicts the acetalisation reaction of D-ribose 1. With acetone or 2,2-dimethoxypropane as the acetalisation reagent the reaction is under thermodynamic reaction control and results in the ...
Since many sugars are polyhydroxy aldehydes and ketones, sugars are a rich source of acetals and ketals. Most glycosidic bonds in carbohydrates and other polysaccharides are acetal linkages. [2] Cellulose is a ubiquitous example of a polyacetal. Benzylidene acetal and acetonide as protecting groups used in research of modified sugars.
Approximately 80-90% of the hydroxyl groups of wood are modified during the process. The whole process is an environmentally friendly treatment, and has emerged, in the 21st century, as a significant innovation in the scientific area of wood science. [15] [16]
Chemical formula Synonyms CAS number C 20 F 42: perfluoroicosane: 37589-57-4 C 20 H 6 I 4 Na 2 O 5: erythrosine: 16423-68-0 C 20 H 12: perylene: 198-55-0 C 20 H 12: benz(e)acephenanthrylene: 205-99-2 [1]: C 20 H 12 O 5
The general structure of a hemiacetal (left) and hemiketal (right). 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.
Acetoacetate is an intermediate in the Krebs cycle which releases energy from sugars and carbohydrates. [22] In medicine, acetone, acetoacetate, and beta-hydroxybutyrate are collectively called ketone bodies, generated from carbohydrates, fatty acids, and amino acids in most vertebrates, including humans.
This is a list of sugars and sugar products. Sugar is the generalized name for sweet, short-chain, soluble carbohydrates, many of which are used in food. They are composed of carbon, hydrogen, and oxygen. There are various types of sugar derived from different sources.
Carbohydrase is the name of a set of enzymes that catalyze five types of reactions, turning carbohydrates into simple sugars, from the large family of glycosidases. [1] Carbohydrases are produced in the pancreas, salivary glands and small intestine, breaking down polysaccharides.