Cas 891980-85-1,C15H12Cl2N2O3

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Check Digit Verification of cas no

The CAS Registry Mumber 891980-85-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,9,1,9,8 and 0 respectively; the second part has 2 digits, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 891980-85:
(8*8)+(7*9)+(6*1)+(5*9)+(4*8)+(3*0)+(2*8)+(1*5)=231
231 % 10 = 1
So 891980-85-1 is a valid CAS Registry Number.

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891980-85-1Relevant articles and documents

Parallel synthesis of 1,2,4-oxadiazoles from carboxylic acids using an improved, uronium-based, activation

Poulain, Rébecca F.,Tartar, André L.,Déprez, Benot P.

, p. 1495 - 1498 (2007/10/03)

We describe the synthesis of 1,2,4-oxadiazoles from carboxylic acids and amidoximes using 2-(1H-benzotriazole-1-yl)-1,1,3,3-tetramethyluronium tetrafluoroborate (TBTU) as an activating agent of the carboxylic acid function for the O-acylation step. This method was used for the synthesis of a library of 24 1,2,4-oxadiazoles.

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891980-85-1