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1228377-57-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1228377-57-8 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,2,8,3,7 and 7 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1228377-57:
168 % 10 = 8
So 1228377-57-8 is a valid CAS Registry Number.

1228377-57-8Downstream Products

1228377-57-8Relevant articles and documents

Regio- and stereocontrolled palladium-catalyzed allylic substitution on n-acetylneuraminic acid derivatives

Chang, Chih-Wei,Norsikian, Stephanie,Guillot, Regis,Beau, Jean-Marie

, p. 2280 - 2294 (2010)

A process for highly effective regio- and stereoselective palladium-catalyzed allylic substitution of 2,3-unsaturated derivatives of N-acetylneuraminic acid (Neu5Ac2en) has been developed. We show that the efficiency of the allylation reaction depends on suitable protecting groups on the starting material and that, with sodium malonate anion as a nucleophile, the regioselectivity can be fine-tuned by the nature of the ligands associated with the palladium complex. These results are explained by the stoichiometric preparation and study of the highly probable complexes involved in the catalytic reaction. Reactions of this type were also applied to other nucleophiles for the construction of C-C, C-N, and. C-O bonds, leading to the major formation of the C-4 regioisomers. The selective transformation of some of the substitution products provided easy access to a variety of modified sialic acid derivatives that might serve as useful, sialyl building blocks for biological research.

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