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51842-30-9

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51842-30-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 51842-30-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,1,8,4 and 2 respectively; the second part has 2 digits, 3 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 51842-30:
(7*5)+(6*1)+(5*8)+(4*4)+(3*2)+(2*3)+(1*0)=109
109 % 10 = 9
So 51842-30-9 is a valid CAS Registry Number.

51842-30-9Relevant articles and documents

Monoacetylation of carbohydrate diols via transesterification with ethyl acetate

Liu, Xuyu,Becker, Bernd,Cooper, Matthew A.

, p. 679 - 683 (2014/05/06)

Monoacetylation of secondary diols in protected monosaccharides was achieved with ethyl acetate as acyl donor and sodium tert-butoxide as a base. The regioseletivity of the reaction varied depending on the substrate. This new method provides a simple, fast, and efficient method to access selectively acetylated carbohydrates that is compatible with acid-sensitive protecting groups. CSIRO 2014.

Mild and efficient method for the cleavage of benzylidene acetals using HClO4-SiO2 and direct conversion of acetals to acetates

Agnihotri, Geetanjali,Misra, Anup Kumar

, p. 3653 - 3658 (2007/10/03)

HClO4-SiO2 has been used successfully for the deprotection of benzylidene acetals and the direct conversion of benzylidene acetals to the corresponding di-O-acetates. The reactions are very fast and yields are excellent.

An easy approach for the acetylation of saccharidic alcohols. Applicability for regioselective protections

Adinolfi, Matteo,Barone, Gaspare,Iadonisi, Alfonso,Schiattarella, Marialuisa

, p. 4661 - 4663 (2007/10/03)

Cheap 4 ? molecular sieves can promote acetylation of carbohydrate hydroxyl functions with Ac2O in absence of any co-reagent. The procedure is compatible with the presence of a variety of acid labile protecting groups and can be exploited for regioselective protections.

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