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1128-60-5

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1128-60-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1128-60-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,1,2 and 8 respectively; the second part has 2 digits, 6 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1128-60:
(6*1)+(5*1)+(4*2)+(3*8)+(2*6)+(1*0)=55
55 % 10 = 5
So 1128-60-5 is a valid CAS Registry Number.

1128-60-5Downstream Products

1128-60-5Relevant articles and documents

Kinetic Study on the Anelation of Heterocycles. 3. Pyrazinopyrimidine Derivatives Synthesized by the Hinsberg Reaction

Abasolo, Maria Ines,Fernandez, Beatriz M.,Magrini, Edgardo

, p. 1279 - 1283 (2007/10/02)

A kinetic study on the obtainment of pyrazinopyrimidine derivatives (pteridines) was performed.The regioselective synthesis of compounds 6-methylpyrazinopyrimidin-7(8H)-one (5a) and 7-methylpyrazinopyrimidin-6(5H)-one (5b), in good yields, was expected by the Hinsberg reaction because the synthesis of both isomers analytically pure was never reported to date.This Hinsberg reaction gave good results to obtain compound 5a, regioselectively and in good yields, either in pH 5 aqueous buffer solution or in methylene chloride, among several organic solvents.However, structural and solvation factors prevented the synthesis of the isomer 5b, which was regioselectively formed in very acid solutions (Ho = -0.89), but in very poor yield.

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