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408349-80-4

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408349-80-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 408349-80-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,0,8,3,4 and 9 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 408349-80:
(8*4)+(7*0)+(6*8)+(5*3)+(4*4)+(3*9)+(2*8)+(1*0)=154
154 % 10 = 4
So 408349-80-4 is a valid CAS Registry Number.

408349-80-4Relevant articles and documents

Di-, tri- and tetrapeptide-linked dicatechol derivatives

Albrecht,Spiess,Schneider

, p. 126 - 132 (2007/10/03)

Di-, tri- and tetrapeptide linked dicatechol derivatives are prepared by subsequent coupling of 2,3-dimethoxybenzoic acid (2), peptides 3 and 2,3-dimethoxybenzylamine (5) using classical activating conditions (EDC/HOBt or DDC/HOSu). In the final step the methyl ethers at the veratrol units are cleaved to afford the free catechol derivatives 7, which are potential ligands for metal complexes with well defined fixed conformations at the peptide spacers.

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