916903-66-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 916903-66-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,1,6,9,0 and 3 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 916903-66:
(8*9)+(7*1)+(6*6)+(5*9)+(4*0)+(3*3)+(2*6)+(1*6)=187
187 % 10 = 7
So 916903-66-7 is a valid CAS Registry Number.
916903-66-7Relevant articles and documents
Beta-lactam synthesis
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Page/Page column 10, (2008/06/13)
The present invention is directed to a process for the preparation of β-lactams. Generally, an imine is cyclocondensed with a ketene acetal or enolate to form the β-lactam product in a "one pot" synthesis, this process is generally performed at a higher temperature than conventional processes.
