A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 34213-34-8, Name is Methyl 2,3,4-Tri-O-acetyl-b-D-glucuronic Acid Methyl Ester, molecular formula is C14H20O10. In a Article£¬once mentioned of 34213-34-8, name: Methyl 2,3,4-Tri-O-acetyl-b-D-glucuronic Acid Methyl Ester
In the chromate oxidation of a partially acylated sugar derivative to form the corresponding uronic acid, acyl migration to the primary alcohol group is a frequent cause of interference.In contrast to more commonly employed ester substituents, the O-levulinoyl group is far less prone to migration during oxidations with Jones reagent (chromic-sulfuric acids).Examples described here include levulinoyl at O-5 of acyclic and furanose derivatives, and both eq and ax O-4 of pyranose derivatives.It is also shown that, because of the acidity of the Jones reagent, use of the O-levulinoyl group, in combination with a primary p-anisyldiphenylmethyl substituent, permits sequential rapid hydrolysis of the latter and oxidation of the newly exposed alcohol group, which favors high overall yields.In contrast to its immobility in these oxidation reactions, when the leulinoyl group is on O-2 of an aldosyl bromide, it participates in 1,2-orthoester formation as rapidly as O-acetyl.The 2,3,4,6-tetraacetate of either anomer of methyl D-glucopyranoside is oxidized to a uronic acid in moderate yield, by chromic acid in 5:1 acetic acid-water.
Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.name: Methyl 2,3,4-Tri-O-acetyl-b-D-glucuronic Acid Methyl Ester. In my other articles, you can also check out more blogs about 34213-34-8
Reference£º
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics