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253609-31-3

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253609-31-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 253609-31-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,3,6,0 and 9 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 253609-31:
(8*2)+(7*5)+(6*3)+(5*6)+(4*0)+(3*9)+(2*3)+(1*1)=133
133 % 10 = 3
So 253609-31-3 is a valid CAS Registry Number.

253609-31-3Relevant articles and documents

Highly stereoselective synthesis of 1,3-aminoalcohols via Mannich reactions

Kossenjans, Michael,Martens, Juergen

, p. 3409 - 3416 (2007/10/03)

Diastereoselective synthesis of β-amino ketones by a one-pot Mannich reaction and their subsequent reduction afforded sterically congested enantiomerically pure 1,3-aminoalcohols in high diastereoselectivity: dr up to >98:2 over two steps. The absolute configurations of the newly created stereogenic centers were assigned by NMR spectroscopy and chemical correlation.

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