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20021-57-2

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20021-57-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20021-57-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,0,2 and 1 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 20021-57:
(7*2)+(6*0)+(5*0)+(4*2)+(3*1)+(2*5)+(1*7)=42
42 % 10 = 2
So 20021-57-2 is a valid CAS Registry Number.

20021-57-2Downstream Products

20021-57-2Relevant articles and documents

Polyhydroxyamino Compounds via Diene Synthesis with Nitroso Compounds, IV. - Preparation and Stereochemistry of Dideoxyinosamine Derivatives

Kresze, Guenter,Kysela, Ernst

, p. 202 - 209 (2007/10/02)

The general method for the synthesis of polyhydroxy amines by Diels-Alder reactions with a nitroso compound, reduction of the adduct with cleavage of the N - O bond and hydroxylation of the remaining C = C -double bond, can also be realized with α-chloronitrosocyclohexane as dienophile, in good yield.Primary amines are synthesized in this way.

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