51989-07-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 51989-07-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,1,9,8 and 9 respectively; the second part has 2 digits, 0 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 51989-07:
(7*5)+(6*1)+(5*9)+(4*8)+(3*9)+(2*0)+(1*7)=152
152 % 10 = 2
So 51989-07-2 is a valid CAS Registry Number.
51989-07-2Relevant academic research and scientific papers
The Chemistry of 4-Mercaptoazetidine-2-ones. Part 2. Synthesis of Bisnorpenicillins
Osborne, Neal F.
, p. 150 - 155 (2007/10/02)
Reaction of the 4-mercaptoazetidinone (2) with benzyl 2-bromoacrylate gave the C-3-epimeric bisnorpenicillin esters (6b) and (7b).Standard procedures were used to convert the ester (6b) into bisnorpenicillin V (3) and bisnorampicillin (15).By contrast (2)
