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1005490-20-9

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1005490-20-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1005490-20-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,0,5,4,9 and 0 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1005490-20:
(9*1)+(8*0)+(7*0)+(6*5)+(5*4)+(4*9)+(3*0)+(2*2)+(1*0)=99
99 % 10 = 9
So 1005490-20-9 is a valid CAS Registry Number.

1005490-20-9Relevant articles and documents

Acetic acid mediated coupling of 2-aminonicotinamides with ortho esters: A convenient, scalable synthesis of 2,3-substituted pyrido[2,3-d]pyrimidines

Chan, Johann,Gustin, Darin,Divirgilio, Evan,Guram, Anil,Faul, Margaret M.

, p. 3678 - 3682 (2008/09/19)

Substituted pyrido[2,3-d]pyrimidines are synthesized in good to excellent yields by treatment of various 2-aminonicotinamides with triethyl orthopropionate or triethyl orthoacetate in the presence of acetic acid. Georg Thieme Verlag Stuttgart.

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