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223689-25-6

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223689-25-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 223689-25-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,3,6,8 and 9 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 223689-25:
(8*2)+(7*2)+(6*3)+(5*6)+(4*8)+(3*9)+(2*2)+(1*5)=146
146 % 10 = 6
So 223689-25-6 is a valid CAS Registry Number.

223689-25-6Relevant articles and documents

An asymmetric synthesis of ADDA, and ADDA-glycine dipeptide using the ss-lactam synthon method

Cundy, Darren J.,Donohue, Andrew C.,McCarthy, Tom D.

, p. 559 - 567 (2007/10/03)

The paper describes the synthesis of the W-Boc lactam 4, and demonstrates that it is an important intermediate in the synthesis of dipeptide 5 (X = H, n = 0, R = Me), an analogue of the ADDA-GIu dipeptide 3. In addition we have described a mild method for the preparation of the amino acid salt ADDA-HC1, and provided synthetic methods, and full characterisation for the previously 'elusive' free amino acid ADDA.

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