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731851-85-7

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731851-85-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 731851-85-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,3,1,8,5 and 1 respectively; the second part has 2 digits, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 731851-85:
(8*7)+(7*3)+(6*1)+(5*8)+(4*5)+(3*1)+(2*8)+(1*5)=167
167 % 10 = 7
So 731851-85-7 is a valid CAS Registry Number.

731851-85-7Relevant articles and documents

A new synthesis of oxcarbazepine using a Friedel-Crafts cyclization strategy

Kaufmann, Daniel,Fünfschilling, Peter C.,Beutler, Ulrich,Hoehn, Pascale,Lohse, Olivier,Zaugg, Werner

, p. 5275 - 5278 (2007/10/03)

A novel, simple, and straightforward process for the large-scale synthesis of oxcarbazepine, the active ingredient of Trileptal, a medicine for the treatment of epilepsy, has been developed. Starting from readily available 1,3-dihydro-1-phenyl-2H-indol-2-one, a Friedel-Crafts cyclization strategy provides a direct route to the tricyclic framework of the target molecule. Crucial to the success of the strategy was the choice of the proper nitrogen-protecting group.

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