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1304495-09-7

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1304495-09-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1304495-09-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,0,4,4,9 and 5 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1304495-09:
(9*1)+(8*3)+(7*0)+(6*4)+(5*4)+(4*9)+(3*5)+(2*0)+(1*9)=137
137 % 10 = 7
So 1304495-09-7 is a valid CAS Registry Number.

1304495-09-7Relevant articles and documents

Synthesis of heterobactins A and B and Nocardia heterobactin

Bergeron, Raymond J.,Singh, Shailendra,Bharti, Neelam

experimental part, p. 3163 - 3169 (2011/05/30)

The synthesis of the Rhodococcus erythropolis siderophores heterobactins A and B, and the structurally related Nocardia heterobactin, is described. Two approaches for the assembly of these asymmetric ligand donor chelators are explored. In the first approach, a scheme predicated on the biosynthesis of the Paracoccus denitrificans siderophore, parabactin, is employed. In this approach, the central donor synthon is added last. In the second scheme, the central donor and the terminal 2,3-dihydroxybenzoyl fragment are first fixed to the ligand's d-ornithine backbone. This is followed by condensation with the cyclic ornithine hydroxamate glycine segment. The schemes offer a flexible approach to other heterobactins. Job's plots suggest that heterobactin A and Nocardia heterobactin form 1:1 ligand/metal complexes, while heterobactin B forms a 3:2 ligand/metal complex.

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