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691889-78-8

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691889-78-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 691889-78-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,9,1,8,8 and 9 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 691889-78:
(8*6)+(7*9)+(6*1)+(5*8)+(4*8)+(3*9)+(2*7)+(1*8)=238
238 % 10 = 8
So 691889-78-8 is a valid CAS Registry Number.

691889-78-8Downstream Products

691889-78-8Relevant articles and documents

Synthesis and tautomeric structure of 2-[N-aryl-2-oxo-2- arylethanehydrazonoyl]-6-methyl-4(3H)-pyrimidinones

Shawali, Ahmad Sami,Farghaly, Thoraya A.

, p. 3051 - 3057 (2004)

Two series of 2-(N-aryl-2-oxo-2-arylethanehydrazonoyl)-6-methyl-4(3H)- pyrimidinones 11 (12) were prepared by coupling of diazotized anilines with 2-(aroylmethylene)-1,2-dihydro-6-methyl-4(3H)-pyrimidinones 2 (3). The spectral data of such compounds together with their 3-methyl analogs 13 (14) indicated that they exist predominantly in the hydrazone tautomeric form.

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