77722-23-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 77722-23-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,7,2 and 2 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 77722-23:
(7*7)+(6*7)+(5*7)+(4*2)+(3*2)+(2*2)+(1*3)=147
147 % 10 = 7
So 77722-23-7 is a valid CAS Registry Number.
77722-23-7Relevant articles and documents
Synthesis of Heterocycles. Part II. New Routes to Acetylthiadiazolines and Alkylazothiazoles
Eweiss, N.F.,Osman, A.
, p. 1713 - 1717 (2007/10/02)
Methylglyoxalyl chloride arylhydrazones (III) react with an ethanolic solution of thiourea to give 2-amino-4-methyl-5-arylazothiazoles (XII) instead of the expected 2-acetyl-4-aryl-5-imino-Δ2-1,3,4-thiadiazolines (V) which were obtained from II
