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779284-19-4

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779284-19-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 779284-19-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,7,9,2,8 and 4 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 779284-19:
(8*7)+(7*7)+(6*9)+(5*2)+(4*8)+(3*4)+(2*1)+(1*9)=224
224 % 10 = 4
So 779284-19-4 is a valid CAS Registry Number.

779284-19-4Relevant articles and documents

Asymmetric Michael addition organocatalyzed by α,β-dipeptides under solvent-free reaction conditions

Avila-Ortiz, C. Gabriela,Lenin, Diaz-Corona,Erika, Jiménez-González,Juaristi, Eusebio

, (2017/09/01)

The application of six novel α,β-dipeptides as chiral organocatalysts in the asymmetric Michael addition reaction between enolizable aldehydes and N-arylmaleimides or nitroolefins is described. With N-arylmaleimides as substrates, the best results were achieved with dipeptide 2 as a catalyst in the presence of aq. NaOH. Whereas dipeptides 4 and 6 in conjunction with 4-dimethylaminopyridine (DMAP) and thiourea as a hydrogen bond donor proved to be highly efficient organocatalytic systems in the enantioselective reaction between isobutyraldehyde and various nitroolefins.

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