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221893-57-8

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221893-57-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 221893-57-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,8,9 and 3 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 221893-57:
(8*2)+(7*2)+(6*1)+(5*8)+(4*9)+(3*3)+(2*5)+(1*7)=138
138 % 10 = 8
So 221893-57-8 is a valid CAS Registry Number.

221893-57-8Downstream Products

221893-57-8Relevant articles and documents

A new approach to the synthesis of 2-aminoimidazo[1,2-α]pyridine derivatives through microwave-assisted N-alkylation of 2-halopyridines

Vega, Juan A.,Vaquero, Juan J.,Alvarez-Builla, Julio,Ezquerra, Jesus,Hamdouchi, Chafiq

, p. 2317 - 2326 (2007/10/03)

A microwave (focused waves) assisted N-alkylation of 2-halopyridines provides a convenient entry to 2-amino-imidazo[1,2-a]pyridine derivatives after reaction of the alkylated substrates with cyanamide under basic conditions.

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