71687-19-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 71687-19-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,6,8 and 7 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 71687-19:
(7*7)+(6*1)+(5*6)+(4*8)+(3*7)+(2*1)+(1*9)=149
149 % 10 = 9
So 71687-19-9 is a valid CAS Registry Number.
71687-19-9Relevant academic research and scientific papers
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
