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109658-32-4

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109658-32-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 109658-32-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,6,5 and 8 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 109658-32:
(8*1)+(7*0)+(6*9)+(5*6)+(4*5)+(3*8)+(2*3)+(1*2)=144
144 % 10 = 4
So 109658-32-4 is a valid CAS Registry Number.

109658-32-4Relevant articles and documents

Synthesis of 3-cyano-6-methyl-4-pyridyl and 3-cyano-4-methyl-6-pyridyl-pyrid-2(1H)-ones

Hahfeld, Vera,Leistner, S.,Wagner, G.

, p. 762 - 764 (2007/10/02)

The reaction of the asymmetric substituted 1,3-diketones 1 and 2 with cyanoacetamide (5) and cyanothioacetamide (6), respectively, gave the 4-pyridyl substituted A/8, C/11 and C/12, respectively, as main products; besides the 6-pyridyl substituted pyridone B/9 was formed as main product.As by-products the 6-pyridyl substituted B/10, D/13 and D/14 were found as well as the 4-pyridyl substituted A/7.The separation of the pyridones and thiopyridones succeeded by fractionated crystallization.The reaction of the thiopyridones C/11 and C/12 with ethyl chloroacetate gave the corresponding thienopyridines 15 and 16, respectively.The confirmation of the structures of the isomeric pyridones A/7, B/9 and A/8, B/10, respectively, as well as the thiopyridones C/11, D/13 and C/12, D/14, respectively, was provided by analytical methods, as 13C-NMR-, mass- and UV-VIS-spectra.

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