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128039-12-3

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128039-12-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128039-12-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,0,3 and 9 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 128039-12:
(8*1)+(7*2)+(6*8)+(5*0)+(4*3)+(3*9)+(2*1)+(1*2)=113
113 % 10 = 3
So 128039-12-3 is a valid CAS Registry Number.

128039-12-3Relevant articles and documents

Novel Reaction of Uracil Derivatives Possessing Electron-withdrawing Groups at the 5-Position with Amines: Exchange Reaction between the N1-Portion of Uracils and Amines

Hirota, Kosaku,Kitade, Yukio,Sajiki, Hironao,Maki, Yoshifumi,Yogo, Motoi

, p. 367 - 373 (2007/10/02)

The reaction of 1,3-disubstituted uracils possessing an electron-withdrawing group such as nitro, carbamoyl, and cyano at 5-position with primary amines resulted in the exchange of the N1-portion of the uracil ring with the amine moiety.The exchange reactions were influenced by the nature of substituents at the 5- and N1-position.The reaction sequence is explained in terms of addition, ring-opening, and ring-closure.

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