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21798-20-9

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21798-20-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21798-20-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,7,9 and 8 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 21798-20:
(7*2)+(6*1)+(5*7)+(4*9)+(3*8)+(2*2)+(1*0)=119
119 % 10 = 9
So 21798-20-9 is a valid CAS Registry Number.

21798-20-9Upstream product

21798-20-9Downstream Products

21798-20-9Relevant articles and documents

SnCl2·2H2O-Catalyzed Solvent-Free Synthesis of α-Amino Ketones and Tetrasubstituted Pyrazines

Tamaddon, Fatemeh,Dehghani Tafti, Arefeh

, p. 2217 - 2220 (2016)

Solvent-free reaction of various anilines with α-hydroxy ketones catalyzed by SnCl2·2H2O provides α-amino ketones in excellent yields. While a similar reaction with aliphatic amines is applicable for the synthesis of substituted pyrazines, SnCl2·2H2O permits versatility in the solvent-free reaction of α-hydroxy ketones with ammonium acetate to give the corresponding substituted pyrazines in good to excellent yields.

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