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722479-69-8

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722479-69-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 722479-69-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,2,2,4,7 and 9 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 722479-69:
(8*7)+(7*2)+(6*2)+(5*4)+(4*7)+(3*9)+(2*6)+(1*9)=178
178 % 10 = 8
So 722479-69-8 is a valid CAS Registry Number.

722479-69-8Relevant articles and documents

Design, synthesis, and evaluation of α-ketoheterocycles as class C β-lactamase inhibitors

Kumar, Sanjai,Pearson, Andre L.,Pratt

, p. 2035 - 2044 (2001)

A series of specific α-ketoheterocycles (benzoxazole, thiazole, imidazole, tetrazole, and thiazole-4-carboxylate) has been synthesized in order to assess their potential as β-lactamase inhibitors. The syntheses were achieved either by construction of the heterocycle (benzoxazole) from an appropriate α-hydroxyimidate, followed by oxidation of the alcohol, or by direct reaction of methyl phenaceturate with a lithiated heterocycle. The properties of these compounds in aqueous solution are described and their inhibitory activity against β-lactamases assessed. They did inhibit the class C β-lactamase of Enterobacter cloacae P99 but not the TEM β-lactamase. The most effective inhibitor of the former enzyme (Ki = 0.11 mM) was 5-(phenylacetylglycyl) tetrazole, probably because it is an anion at neutral pH. Interpretation of the results was aided by computational models of the tetrahedral adducts. Most of the compounds also inhibited α-chymotrypsin but not porcine pancreatic elastase.

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