898643-23-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 898643-23-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,9,8,6,4 and 3 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 898643-23:
(8*8)+(7*9)+(6*8)+(5*6)+(4*4)+(3*3)+(2*2)+(1*3)=237
237 % 10 = 7
So 898643-23-7 is a valid CAS Registry Number.
898643-23-7Relevant academic research and scientific papers
Facile approach to the synthesis of substituted thieno[2,3-d]pyrimidin-4- ones
Hovhannisyan, Anna,Aristakesyan, Lilit,Melikyan, Gagik
, p. 253 - 256 (2013/05/09)
Condensation of Gewald's thiophenes substituted with a dimethylaminomethyleneamino group at position 2 with primary amines yields 5/6-aryl-thieno[2,3-d] pyrimidin-4-ones with variable substituents at the N3 position.
