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857561-19-4

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857561-19-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 857561-19-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,5,7,5,6 and 1 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 857561-19:
(8*8)+(7*5)+(6*7)+(5*5)+(4*6)+(3*1)+(2*1)+(1*9)=204
204 % 10 = 4
So 857561-19-4 is a valid CAS Registry Number.

857561-19-4Downstream Products

857561-19-4Relevant articles and documents

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

Tamaddon, Fatemeh,Dehghani Tafti, Arefeh

, p. 2217 - 2220 (2016/10/11)

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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