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81928-98-5

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81928-98-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81928-98-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,9,2 and 8 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 81928-98:
(7*8)+(6*1)+(5*9)+(4*2)+(3*8)+(2*9)+(1*8)=165
165 % 10 = 5
So 81928-98-5 is a valid CAS Registry Number.

81928-98-5Relevant articles and documents

Study of the stereoselectivity of 2-azido-2-deoxygalactosyl donors: Remote protecting group effects and temperature dependency

Kalikanda, Jane,Li, Zhitao

experimental part, p. 5207 - 5218 (2011/08/09)

The stereoselectivity of glycosylation reactions is affected by many factors. Synthesis of 1,2-cis glycosidic linkages (such as α linkages in glucose and galactose like monosaccharides) is challenging due to lack of control of the stereoselectivity. Our s

Linear synthesis of the tumor-associated carbohydrate antigens Globo-H, Ssea-3, and Gb3

Bosse, Folkert,Marcaurelle, Lisa A.,Seeberger, Peter H.

, p. 6659 - 6670 (2007/10/03)

The tumor-associated carbohydrate antigens Globo-H, SSEA-3, and Gb3 were synthesized in a linear fashion using glycosyl phosphate monosaccharide building blocks. All of the building blocks were prepared from readily available common precursors. The difficult α-(1→-4-cis)-galactosidic linkage was installed using a galactosyl phosphate donor with high selectivity. Introduction of the β-galactosamine unit required the screening a variety of amine protecting groups to ensure good donor reactivity and protecting group compatibility. An N-trichloroacetyl-protected galactosamine donor performed best for the installation of the β-glycosidic linkage. Conversion of the trichloroacetyl group to the N-acetyl group was achieved under mild conditions, fully compatible with the presence of multiple glycosidic bonds. This synthetic strategy is expected to be amenable to the synthesis of the globo-series of tumor antigens on solid-support.

Simple oxidation of 3-O-silylated glycals: Application in deblocking 3-0-protected glycals

Kirschning, Andreas,Hary, Ulrike,Plumeier, Claus,Ries, Monika,Rose, Lars

, p. 519 - 528 (2007/10/03)

A high yielding allylic oxidation of 3-O-siIylated glycals 5-10 with the reagent system PhI(OAc)2-TMSN3 is presented. The iodine(m) species generated under these conditions is a lot more effective for generating carbohydrate-derived 3-trialkylsiloxy-2,3-d

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