143884-85-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 143884-85-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,8,8 and 4 respectively; the second part has 2 digits, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 143884-85:
(8*1)+(7*4)+(6*3)+(5*8)+(4*8)+(3*4)+(2*8)+(1*5)=159
159 % 10 = 9
So 143884-85-9 is a valid CAS Registry Number.
143884-85-9Relevant articles and documents
Synthesis of isatin 3-oximes from 2-nitroacetanilides
Kearney,Harris,Jackson,Joule
, p. 769 - 772 (1992)
2-Nitroacetanilides, prepared by alkaline hydrolysis of 1-arylamino-1-methylthio-2-nitroethenes, are converted into isatin (1H-indole-2,3-dione) 3-oximes by treatment with concentrated sulfuric acid or trifluoromethanesulfonic acid at room temperature.
