23511-42-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 23511-42-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,5,1 and 1 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 23511-42:
(7*2)+(6*3)+(5*5)+(4*1)+(3*1)+(2*4)+(1*2)=74
74 % 10 = 4
So 23511-42-4 is a valid CAS Registry Number.
23511-42-4Relevant articles and documents
Ueber die Synthese von 2,3-Dialkylpyrazinen
Heyns, Kurt,Behse, Ernst,Francke, Wittko
, p. 240 - 245 (2007/10/02)
2,3-Dialkylquinoxalines (4), which are available from the reaction of benzofuroxan (1) with ketones and subsequent reduction of the 2,3-dialkylquinoxaline N,N'-dioxides (3), are converted to 2,3-dialkylpyrazines (6) by oxidation-decarboxylation steps.