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Methyl 3-O-methyl-α-D-xylopyranoside is a chemical compound with the molecular formula C7H14O5. It is a derivative of α-D-xylopyranose, a monosaccharide sugar, where one of the hydroxyl groups at the 3-position is replaced by a methyl group, and the remaining hydroxyl groups are in the pyranose ring form. methyl 3-O-methyl-α-D-xylopyranoside is an important intermediate in the synthesis of various complex carbohydrates and glycoconjugates, as it allows for the introduction of additional functional groups and modifications to the sugar molecule. It is also used in the study of carbohydrate chemistry and biochemistry, particularly in the investigation of enzyme specificity and the development of new glycosylation methods.

7434-29-9

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7434-29-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 7434-29-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,4,3 and 4 respectively; the second part has 2 digits, 2 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 7434-29:
(6*7)+(5*4)+(4*3)+(3*4)+(2*2)+(1*9)=99
99 % 10 = 9
So 7434-29-9 is a valid CAS Registry Number.

7434-29-9Downstream Products

7434-29-9Relevant academic research and scientific papers

Regioselective methylation of methyl glycopyranosides with diazomethane in the presence of transition-metal chlorides and of boric acid

Evtushenko, Evgeny V.

, p. 187 - 200 (2007/10/03)

Partial methylation of the methyl pyranosides of a number of pentoses, hexoses, 6-deoxyhexoses, methyl uronates and their methyl ethers with diazomethane in the presence of transition-metal chlorides and boric acid was studied. It was found for methyl glycosides of pentoses and 6-deoxyhexoses that tin(II), antimony(III), and titanium(IV) chlorides as well as boric acid promoted substitution mainly of OH-3, but with cerium(III) and zinc(II) salts mainly substitution of OH-2 was observed. Methylation of methyl β-l-rhamnopyranoside demonstrated higher reactivity of OH-2 in all cases. The methylation of methyl glycosides of hexoses in the presence of tin(II), antimony(III) and cerium(III) chlorides gave mainly 3-methyl ethers. The 3-methyl ethers, which are not involved in further complexation, accumulated up to 50-80% of the reaction mixture (95-100% of monomethyl ether fraction). Convenient preparative syntheses of methyl ethers for a number of sugars are suggested. Copyright (C) 1999 Elsevier Science Ltd.

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