Cas 857042-43-4,5-[(Z)-(hydroxyimino)(phenyl)methyl]pyrimidin-4(3H)-one

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Check Digit Verification of cas no

The CAS Registry Mumber 857042-43-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,5,7,0,4 and 2 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 857042-43:
(8*8)+(7*5)+(6*7)+(5*0)+(4*4)+(3*2)+(2*4)+(1*3)=174
174 % 10 = 4
So 857042-43-4 is a valid CAS Registry Number.

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857042-43-4Relevant academic research and scientific papers

Reactions of benzonitrile oxide with methoxypyrimidines and pyrimidones

Corsaro, Antonino,Pistara, Venerando,Rescifina, Antonio,Chiacchio, Maria A.,Piperno, Anna,Romeo, Giovanni

, p. 1079 - 1097 (2007/10/03)

Methoxypyrimidines preferentially add to benzonitrile oxide to give cycloadducts to their C=N double bonds. These, however, lose benzonitrile affording the corresponding pyrimidones. Cycloadditions to their C=C double bonds take place to a very low extent, and products generally undergo a ring opening process which affords the corresponding oximes. Pyrimidones preferentially give addition products to their nitrogen atoms, and only in the case of 4-pyrimidone, the cycloadduct to its C=C double bond was isolated.

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