257925-66-9 Usage
Chemical compound
A substance formed by a chemical reaction, consisting of a glucose molecule with three acetyl groups and a benzylidene group attached.
Consists of
A glucose molecule, three acetyl groups, and a benzylidene group.
Role in organic chemistry
Used as a protecting group for the hydroxyl groups on the glucose molecule, allowing for selective reactions to occur at other functional groups.
Protecting group
A chemical group that temporarily blocks a functional group in a molecule, preventing it from reacting until it is removed.
Common use
As a precursor in the synthesis of various natural and synthetic compounds.
Applications
Used in the production of pharmaceuticals, agrochemicals, and organic materials.
Chemical structure
The arrangement of atoms and bonds in the molecule, which contributes to its reactivity and function.
Reactivity
The tendency of the compound to undergo chemical reactions, which makes it an important intermediate in the synthesis of complex molecules.
Intermediate
A substance that is formed during a chemical reaction and is used to produce other compounds.
Synthesis
The process of combining smaller molecules to form a larger, more complex molecule.
Check Digit Verification of cas no
The CAS Registry Mumber 257925-66-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,7,9,2 and 5 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 257925-66:
(8*2)+(7*5)+(6*7)+(5*9)+(4*2)+(3*5)+(2*6)+(1*6)=179
179 % 10 = 9
So 257925-66-9 is a valid CAS Registry Number.
257925-66-9Relevant articles and documents
METHOD OF PRODUCING GALACTOOLIGOSACCHARIDE, AND INTERMEDIATE THEREOF
-
, (2018/04/21)
PROBLEM TO BE SOLVED: To provide a method of producing a galactooligosaccharide that may cause the onset of allergic reaction, and an intermediate thereof. SOLUTION: A method of producing a galactooligosaccharide represented by the general formula (1) comprises addition of the 1-position of protected galactobiose to the 6-position hydroxy group of protected lactose of formula (5), and subsequent deprotection of a hydroxy group protecting group. SELECTED DRAWING: Figure 5 COPYRIGHT: (C)2018,JPOandINPIT
(13)C-N.M.R. STUDIES OF D-GLUCOSE AND D-GALACTOSE MONOSULPHATES
Archbald, P. Jane,Fenn, M. David,Roy, Alexander B.
, p. 177 - 190 (2007/10/02)
D-Galactose and D-glucose 2-, 3-, 4-, and 6-sulphates, 2,3,4,6-tetra-O-acetyl-β-D-glucose 1-sulphate, and 2-acetamido-2-deoxy-D-glucose 6-sulphate have been definitively synthesised, and the positions of the sulphate groups verified by (13)C-n.m.r. spectroscopy.New syntheses are given for D-galactose 3- and 4-sulphates and for D-glucose 4-sulphate.The (13)C-n.m.r. spectra showed downfield displacements, with respect to the parent sugar, of the shifts of carbon atoms carrying a sulphate group and smaller upfield shifts for adjacent carbon atoms.The technique of deuterium-induced, differential isotope shift (d.i.s.), (13)C-n.m.r. spectroscopy is shown to be valuable for the assignment of chemical shifts.