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20706-90-5

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20706-90-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20706-90-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,7,0 and 6 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 20706-90:
(7*2)+(6*0)+(5*7)+(4*0)+(3*6)+(2*9)+(1*0)=85
85 % 10 = 5
So 20706-90-5 is a valid CAS Registry Number.

20706-90-5Relevant articles and documents

Synthesis of N-protected galactosamine building blocks from D-tagatose via the heyns rearrangement

Wrodnigg, Tanja M.,Lundt, Inge,Stuetz, Arnold E.

, p. 33 - 41 (2007/10/03)

N-Acetyl-D-galactosamine (11), a very important naturally occurring building block of oligosaccharides, is easily accessible via the Heyns rearrangement of D-tagatose (3) with benzylamine. The short and efficient synthesis of various differently N-protected D-galactosamine derivatives is reported. Copyright Taylor & Francis Group, LLC.

Synthesis of 2-amino-2-deoxyglycoses and 2-amino-2-deoxyglycosides from glycals

-

, (2008/06/13)

O-acetylated glycals react with ceric ammonium nitrate in the presence of sodium azide to provide, in good yield, O-acetylated 2-azido-2-deoxy glycosyl nitrates. These nitrates can be used to prepare 2-amino-2-deoxy sugars, such as D-galactosamine and lactosamine. The O-acetylated 2-azido-2-deoxy glycosyl nitrates can alternately be converted to O-acetylated 2-azido-2-deoxy glycosyl halides which are useful in the preparation of O-acetylated 2-azido-2-deoxy glycosides, which in turn can be reduced to 2-amino-2-deoxy glycosides. Of particular interest are the syntheses of 2-amino-2-deoxy glycosides which correspond to the terminal units of the antigenic determinant for the human A blood group. Attachment of these glycosides to a solid support provides immunoabsorbents which efficiently and preferentially absorb anti-A antibodies from blood plasma.

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