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1253690-78-6

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1253690-78-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1253690-78-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,3,6,9 and 0 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1253690-78:
(9*1)+(8*2)+(7*5)+(6*3)+(5*6)+(4*9)+(3*0)+(2*7)+(1*8)=166
166 % 10 = 6
So 1253690-78-6 is a valid CAS Registry Number.

1253690-78-6Downstream Products

1253690-78-6Relevant articles and documents

Enantioselective alcoholysis of meso-glutaric anhydrides catalyzed by Cinchona-based sulfonamide catalysts

Park, Sang Eun,Nam, Eun Hye,Jang, Hyeong Bin,Oh, Joong Suk,Some, Surajit,Lee, Yong Seop,Song, Choong Eui

experimental part, p. 2211 - 2217 (2010/11/19)

The bifunctional Cinchona-based sulfonamide catalysts showed the highest levels of enantioselectivity reported to date in the alcoholytic desymmetrization of meioglutaric anhydrides. Density functional theory (DFT) computational studies provide detailed insight into the observed sense of enantioselectivity. Moreover, detailed experimental studies and single crystal X-ray analysis confirmed that these bifunctional organocatalysts 3 do not form Hbonded self-aggregates in both solution and solid state. The synthetic utility of this methodology was also demonstrated in the synthesis of pharmaceutically important γ-amino acids, such as (S)-pregabalin. Of the many asymmetric syntheses of enantiomerically pure (S)-pregabalin reported to date, our synthesis requires the least number of and the simplest steps.

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