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159215-11-9

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159215-11-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 159215-11-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,9,2,1 and 5 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 159215-11:
(8*1)+(7*5)+(6*9)+(5*2)+(4*1)+(3*5)+(2*1)+(1*1)=129
129 % 10 = 9
So 159215-11-9 is a valid CAS Registry Number.

159215-11-9Relevant articles and documents

Synthesis of new sulfonylamido-penicillanic acid sulfones inhibitors of β-lactamases

Vanwetswinkel,Fastrez,Marchand-Brynaert

, p. 1041 - 1051 (2007/10/02)

Three new sulfonylamido-penicillanic acid sulfones have been prepared by reaction of 6-aminopenicillanic esters with the monoester or monoamide derivatives obtained in nucleophilic substitution reactions by alcohol or aniline on the carboxyl chloride function of sulfoacetic dichloride followed by oxidation. These penicillin sulfones are converted to β-lactamases suicide inhibitors by removal of the C3 ester protecting group. This synthetic strategy can give access to sulfonamido-penam sulfones bearing a variety of 6-amino side chain. These inhibitors inactivate the RTEM β-lactamase rapidly. The kinetics of inactivation are consistent with the partitioning of an acyl-enzyme intermediate between two main pathways: regeneration of free enzyme and irreversible inactivation, little transient inactivation is observed. A slow inhibition by the product of enzymatic hydrolysis of the sulfones is also observed.

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