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20897-16-9

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20897-16-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20897-16-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,8,9 and 7 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 20897-16:
(7*2)+(6*0)+(5*8)+(4*9)+(3*7)+(2*1)+(1*6)=119
119 % 10 = 9
So 20897-16-9 is a valid CAS Registry Number.

20897-16-9Relevant articles and documents

A new synthetic access to N-alkylated nitrones through Lewis acid-catalyzed conjugate additions of aldoximes

Nakama, Kimitaka,Seki, Sumito,Kanemasa, Shuji

, p. 6719 - 6722 (2001)

In the presence of Lewis acid catalysts, aldoximes react with α,β-unsaturated carbonyl compounds at room temperature to give N-alkylnitrones in good yields. Combination of two Lewis acid catalysts, zinc(II) iodide/boron trifluoride etherate (50 mol%/50 mol%), is the best choice to mediate the reactions producing N-alkylated nitrones in excellent yields. In this procedure, a variety of aldoximes and α,β-unsaturated carbonyl acceptors can be employed.

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