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121759-91-9

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121759-91-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 121759-91-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,7,5 and 9 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 121759-91:
(8*1)+(7*2)+(6*1)+(5*7)+(4*5)+(3*9)+(2*9)+(1*1)=129
129 % 10 = 9
So 121759-91-9 is a valid CAS Registry Number.

121759-91-9Relevant articles and documents

SYNTHESIS OF AZA-CROWN COMPOUNDS BY INTRAMOLECULAR CYCLIZATION OF ω-AMINO ACIDS

Mikhura, I. V.,Formanovskii, A. A.

, p. 205 - 212 (2007/10/02)

A method for the synthesis of aza-crown compounds by the intramolecular cyclization of ω-amino acids with subsequent reduction of the lactam to a macrocyclic amine was developed. 1,8-Diazacyclotetradecane and 1,8-dioxa-4,11-diazacyclotetradecane was synthesized in preparative yields.The structural assignments were made using the IR, 1H and 13C NMR, and mass spectra.

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