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400091-19-2

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400091-19-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 400091-19-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,0,0,0,9 and 1 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 400091-19:
(8*4)+(7*0)+(6*0)+(5*0)+(4*9)+(3*1)+(2*1)+(1*9)=82
82 % 10 = 2
So 400091-19-2 is a valid CAS Registry Number.

400091-19-2Relevant articles and documents

Regioselective glycosylation of glucosamine and galactosamine derivates using O-pivaloyl galactosyl donors

O?wald, Mathias,Lang, Uwe,Friedrich-Bochnitschek, Siglinde,Pfrengle, Waldemar,Kunz, Horst

, p. 764 - 774 (2007/10/03)

Penta-O-pivaloyl-galactopyranose and tetra-O-pivaloyl-galactopyranosyl bromide after electrophilic activation reacted with 6-O-protected 2-azido-galactosides to give the precursor structures of the Thomsen-Friedenreich antigen disaccharide with high regioselectivity, but low yield. With 4,6-O-benzylidene protected 2-azidogalactosides and 2-O-pivaloyl phenylthio galactosides, T-antigen disaccharides of this type were obtained in good yields. Glycosylation reactions of 4,6-O-benzylidene protected glucosamine derivatives with O-pivaloyl protected galactosyl bromide efficiently gave lactolactosamine disaccharides. Even a thioglycoside was efficiently galactosylated by this method resulting in the formation of a disaccharide thioglycoside useful itself as a potential glycosyl donor.

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