20241-04-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20241-04-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,2,4 and 1 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 20241-04:
(7*2)+(6*0)+(5*2)+(4*4)+(3*1)+(2*0)+(1*4)=47
47 % 10 = 7
So 20241-04-7 is a valid CAS Registry Number.
20241-04-7Relevant articles and documents
Synthesis in 3 Azafluorene Group. Part-III
Chatterjea, J. N.,Shaw, S. C.,Prasad, Y.,Singh, R. P.
, p. 1028 - 1031 (2007/10/02)
The Hey-Elks route to arylated pyridines has been utilised in the synthesis of 3-azafluorenes.The pyrido-coumarin (23) and the related chromene (24) have been synthesised.