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128009-02-9

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128009-02-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128009-02-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,0,0 and 9 respectively; the second part has 2 digits, 0 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 128009-02:
(8*1)+(7*2)+(6*8)+(5*0)+(4*0)+(3*9)+(2*0)+(1*2)=99
99 % 10 = 9
So 128009-02-9 is a valid CAS Registry Number.

128009-02-9Relevant articles and documents

Esters of 2-Dialkylamino-2-propenoic Acids

Arnold, Zdenek

, p. 39 - 40 (1990)

The title compounds (2a-d) representing α,β-didehydroalanine derivatives and reactive equivalents of pyruvic acid, have been obtained by the reaction of methyl or tert-butyl pyruvate with dimethylamine, piperidine or morpholine in the presence of arsenous trichloride.The synthesis of dimethyl 2,4-dioxopentanedioate is given as an example of the versatile reactivity of these compounds.

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