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912643-33-5

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912643-33-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 912643-33-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,1,2,6,4 and 3 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 912643-33:
(8*9)+(7*1)+(6*2)+(5*6)+(4*4)+(3*3)+(2*3)+(1*3)=155
155 % 10 = 5
So 912643-33-5 is a valid CAS Registry Number.

912643-33-5Relevant articles and documents

An alternate synthesis of enantiomerically pure levetiracetam (Keppra)

Mujahid, M.,Mujumdar, P.,Sasikumar, M.,Kunte, S. S.,Muthukrishnan, M.

, p. 1512 - 1515,4 (2012/12/12)

A simple and efficient synthesis of levetiracetam has been achieved with high enantiopurity (>99%) starting from commercially available benzyl glycidyl ether. The method is amenable for industrial scale-up.

A short enantioselective synthesis of the antiepileptic agent, levetiracetam based on proline-catalyzed asymmetric α-aminooxylation

Kotkar, Shriram P.,Sudalai, Arumugam

, p. 6813 - 6815 (2007/10/03)

An efficient enantioselective synthesis of a new antiepileptic drug, levetiracetam is described, in high optical purity (>99.5% ee), using proline-catalyzed α-aminooxylation of n-butyraldehyde as the key step.

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