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13820-19-4

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13820-19-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 13820-19-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,3,8,2 and 0 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 13820-19:
(7*1)+(6*3)+(5*8)+(4*2)+(3*0)+(2*1)+(1*9)=84
84 % 10 = 4
So 13820-19-4 is a valid CAS Registry Number.

13820-19-4Relevant articles and documents

Torp-Ziegler cyclization in the synthesis of 3-amino-4-cyanopyrrole derivatives

Ryndina,Kadushkin,Solov'eva,Granik

, p. 1409 - 1420 (2007/10/03)

Polyfunctional derivatives of 3-aminopyrrole have been synthesized from several substituted β-enamino nitriles using Torp-Ziegler cyclization. These compounds are starting materials for further conversions, particularly for the synthesis of pyrrolo[3,2-d]

β,β-Diacyl-enamine und -enole, 9. Zur Darstellung von Aminomethylenderivaten offenkettiger CH2-acider Verbindungen

Wolfbeis, Otto S.

, p. 3471 - 3484 (2007/10/02)

The reaction of a combination of primary or secondary aromatic or aliphatic amines with orthocarboxylic esters upon a variety of open-chain CH2-acidic molecules gives N-substituted aminoalkylidene derivatives.The method is highly recommended for methylene

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