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169338-57-2

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169338-57-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 169338-57-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,9,3,3 and 8 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 169338-57:
(8*1)+(7*6)+(6*9)+(5*3)+(4*3)+(3*8)+(2*5)+(1*7)=172
172 % 10 = 2
So 169338-57-2 is a valid CAS Registry Number.

169338-57-2Downstream Products

169338-57-2Relevant articles and documents

Studies on azole-to-azole interconversions. Substituent effects on the ring-degenerate equilibration between 3-aroylamino-5-methyl-1,2,4-oxadiazoles and 3-acetylamino-5-aryl-1,2,4-oxadiazoles

Buscemi,Buscemi, Silvestre,Frenna,Frenna, Vincenzo,Vivona,Vivona, Nicolo,Petrillo,Petrillo, Giovanni,Spinelli,Spinelli, Domenico

, p. 5133 - 5142 (2007/10/02)

The title reaction has been studied both in CD3OD and (t)BuOK/CD3OD by means of 1H NMR measurements. The equilibrium composition and the effect exerted thereon by X-substituents in the aryl moiety have been found to be quite different whether neutral or anionic forms are involved. In the first case the effect of X is meager and 3-acetylamino-1,2,4-oxadiazoles are more stable than the 3-aroylamino-5-methyl isomers. Vice-versa, when anions are involved the substituent effect is remarkable and the equilibrium can be, for strongly electron-withdrawing X-groups, even largely shifted towards the anions of the 3-aroylamino-5-methyl-1,2,4-oxadiazoles.

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