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81649-80-1

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81649-80-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81649-80-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,6,4 and 9 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 81649-80:
(7*8)+(6*1)+(5*6)+(4*4)+(3*9)+(2*8)+(1*0)=151
151 % 10 = 1
So 81649-80-1 is a valid CAS Registry Number.

81649-80-1Relevant articles and documents

Pyrimidine Derivatives and Related Compounds. Part 41. Reactions of 1,3,6-Trimethyl-5-nitrouracil and its 6-Bromomethyl Analogue with Amines and Hydrazines. Synthesis of Pyrazolopyrimidine N-Oxides and their Ring Expansion to Pyrimidopyrimid

Hirota, Kosaku,Yamada, Yoshihiro,Asao, Tetsuji,Senda, Shigeo

, p. 277 - 284 (2007/10/02)

Reactions of 1,3,6-trimethyl-5-nitrouracil (1) and 6-bromomethyl-1,3-dimethyl-5-nitrouracil (4) with amines and hydrazines have been studied with the aim of synthesising fused-ring pyrimidines.Treatment of compound (4) with primary amines afforded 2-subst

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