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1640998-93-1

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1640998-93-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1640998-93-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,4,0,9,9 and 8 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1640998-93:
(9*1)+(8*6)+(7*4)+(6*0)+(5*9)+(4*9)+(3*8)+(2*9)+(1*3)=211
211 % 10 = 1
So 1640998-93-1 is a valid CAS Registry Number.

1640998-93-1Relevant articles and documents

Intramolecular functional group differentiation as a strategy for the synthesis of bridged bicyclic β-amino acids

Tymtsunik, Andriy V.,Kokhan, Serhii O.,Ivon, Yevhen M.,Komarov, Igor V.,Grygorenko, Oleksandr O.

, p. 22737 - 22748 (2016/03/26)

Differentiation of identical electrophilic functional groups (carboxylates) by a strategically placed internal nucleophile (an amino group) in cyclic precursors was used as a key general approach to functionalized azabicyclic scaffolds. The utility of the method was demonstrated by the synthesis of three bicyclic β-amino acids (analogues of nipecotic acid), which were prepared in good yields and on a relatively large scale.

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