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60744-45-8

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60744-45-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 60744-45-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,0,7,4 and 4 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 60744-45:
(7*6)+(6*0)+(5*7)+(4*4)+(3*4)+(2*4)+(1*5)=118
118 % 10 = 8
So 60744-45-8 is a valid CAS Registry Number.

60744-45-8Relevant articles and documents

Amino acid derived heterocycles: Lewis acid catalyzed and radical cyclizations from peptide acetals

Todd, Matthew H.,Ndubaku, Chudi,Bartlett, Paul A.

, p. 3985 - 3988 (2007/10/03)

Bicyclization of peptide acetals via nucleophilic attack of a phenyl group on an endocyclic acyliminium ion 4 was explored as a route to novel amino acid derived heterocycles and peptidomimetic scaffolds. In the presence of protic acid, bridged structures such as 6 are formed readily from phenylalanine derivatives, but the fused-ring analogues 5 could not be obtained in good yield. In contrast, radical cyclization of the bromophenyl dihydropyrazinone 7 provides an effective alternative for the synthesis of 5 (n = 0, 1, 2). Additional versatility in this process was demonstrated by efficient synthesis of a different fused ring system, represented by the antihelmintic praziquantel, 8.

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