121997-03-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 121997-03-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,9,9 and 7 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 121997-03:
(8*1)+(7*2)+(6*1)+(5*9)+(4*9)+(3*7)+(2*0)+(1*3)=133
133 % 10 = 3
So 121997-03-3 is a valid CAS Registry Number.
121997-03-3Relevant articles and documents
One-Pot Synthesis of 3-Aryl-2,3-dihydro-2-thioxobenzofuropyrimidin-4(1H)-ones
Reddy, B. Saida,Reddy, A. Panduranga,Veeranagaiah, V.
, p. 1131 - 1133 (2007/10/02)
Reaction of 3-aminobenzofuran-2-carboxamide (1) with aryl isothiocyanates under different conditions results into 3-aryl-2,3-dihydro-2-thioxoxbenzofuropyrimidin-4(1H)-ones (3), through the intermediate 1-(2-carbamoyl-3-benzofuranyl)-2-thio-3-arylurea(4)
