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197291-57-9

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197291-57-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 197291-57-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,7,2,9 and 1 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 197291-57:
(8*1)+(7*9)+(6*7)+(5*2)+(4*9)+(3*1)+(2*5)+(1*7)=179
179 % 10 = 9
So 197291-57-9 is a valid CAS Registry Number.

197291-57-9Relevant articles and documents

Auxiliary accelerated reactions: Towards the use of catalytic chiral auxiliaries

Westwell, Andrew D.,Williams, Jonathan M. J.

, p. 13063 - 13078 (2007/10/03)

In competition experiments, the acceleration of reactivity of alkenes tethered to pyridyl groups compared with the corresponding alkenes tethered to phenyl groups in the presence of transition metals was demonstrated for two reaction types: Diels-Alder cycloaddition of enoate esters and catalytic hydrogenation of allylic and homoallylic ethers. The rate accelerations observed are of crucial importance in the development of a new concept for asymmetric catalysis: chiral auxiliaries which can function in a catalytic manner.

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