40790-18-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 40790-18-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,0,7,9 and 0 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 40790-18:
(7*4)+(6*0)+(5*7)+(4*9)+(3*0)+(2*1)+(1*8)=109
109 % 10 = 9
So 40790-18-9 is a valid CAS Registry Number.
40790-18-9Relevant 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.