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425431-88-5

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425431-88-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 425431-88-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,2,5,4,3 and 1 respectively; the second part has 2 digits, 8 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 425431-88:
(8*4)+(7*2)+(6*5)+(5*4)+(4*3)+(3*1)+(2*8)+(1*8)=135
135 % 10 = 5
So 425431-88-5 is a valid CAS Registry Number.

425431-88-5Downstream Products

425431-88-5Relevant articles and documents

Asymmetric synthesis of homochiral differentially protected bis-β-amino acid scaffolds

Bull, Steven D,Davies, Stephen G,Roberts, Paul M,Savory, Edward D,Smith, Andrew D

, p. 4629 - 4642 (2007/10/03)

A strategy for the asymmetric synthesis of homochiral [(R,R)- or (S,S)-], or meso-(R,S) bis-β-amino acid scaffolds, formally resulting from the stepwise conjugate addition of two differentially protected homochiral lithium amides to two α,β-unsaturated esters attached to a central arene, is demonstrated. Further manipulation enables the efficient synthesis of orthogonally protected pseudo-meso or pseudo-C2 symmetric scaffolds via selective N-benzyl or N-allyl deprotection, enabling regio-, stereo- and chemoselective functionalisation.

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