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404034-90-8

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404034-90-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 404034-90-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,0,4,0,3 and 4 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 404034-90:
(8*4)+(7*0)+(6*4)+(5*0)+(4*3)+(3*4)+(2*9)+(1*0)=98
98 % 10 = 8
So 404034-90-8 is a valid CAS Registry Number.

404034-90-8Relevant articles and documents

Palladium(0)-catalyzed coupling of organozinc iodide reagents with bromopyridines: Synthesis of selectively protected pyridine-containing azamacrocycles

Skerlj, Renato T.,Zhou, Yuanxi,Wilson, Trevor,Bridger, Gary J.

, p. 1407 - 1410 (2007/10/03)

The synthesis of azamacrocycles in which the ring nitrogens are regioselectively functionalized is described. An organozinc palladium(0)-catalyzed coupling with an appropriately functionalized bromopyridine generated a key intermediate, which was transformed in two steps to a desired precursor and subjected to an intramolecular N-alkylation to effect a macrocyclization affording selectively protected azamacrocycles 1-3.

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