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256389-55-6

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256389-55-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 256389-55-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,6,3,8 and 9 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 256389-55:
(8*2)+(7*5)+(6*6)+(5*3)+(4*8)+(3*9)+(2*5)+(1*5)=176
176 % 10 = 6
So 256389-55-6 is a valid CAS Registry Number.

256389-55-6Relevant articles and documents

An easy access to (S)-pyrrolidinones and -pyrrolidines from chiral benzylic malonates

Arzel, Philippe,Freida, Vincent,Weber, Philippe,Fadel, Antoine

, p. 3877 - 3881 (2007/10/03)

From chiral benzylic malonic acid esters (R)-(+)-4, available with high enantiomeric excesses by enzymatic hydrolysis (PLE acetonic powder), enantiomerically enriched pyrrolidinones 1 and pyrrolidines 2 were prepared. This rapid and competitive method was

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