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161561-97-3

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161561-97-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 161561-97-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,1,5,6 and 1 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 161561-97:
(8*1)+(7*6)+(6*1)+(5*5)+(4*6)+(3*1)+(2*9)+(1*7)=133
133 % 10 = 3
So 161561-97-3 is a valid CAS Registry Number.

161561-97-3Relevant articles and documents

Enantiopure 4- and 5-Aminopiperidin-2-ones: Regiocontrolled Synthesis and Conformational Characterization as Bioactive β-Turn Mimetics

Weber, Klaus,Ohnmacht, Ursula,Gmeiner, Peter

, p. 7406 - 7416 (2007/10/03)

Starting from aspartic acid, we synthesized lactam-bridged β- and γ-amino acid equivalents. Using the 1,4-bis-electrophile 1b as a central intermediate, the 4- and 5-aminopiperidin-2-ones 4 and 8, respectively, were approached by regioselective functional

Homo-Freidinger lactams: Stereoselective synthesis of 4-aminopiperidin-2-one derivatives from aspartic acid

Weber, Klaus,Gmeiner, Peter

, p. 885 - 887 (2007/10/03)

Starting from aspartic acid a stereoselective synthesis of enantiomerically pure 4-aminopiperidin-2-ones which can serve as conformationally restrained β-amino acid equivalents in peptidomimetics is described. The synthesis is based on the regioselective

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