27565-67-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 27565-67-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,7,5,6 and 5 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 27565-67:
(7*2)+(6*7)+(5*5)+(4*6)+(3*5)+(2*6)+(1*7)=139
139 % 10 = 9
So 27565-67-9 is a valid CAS Registry Number.
27565-67-9Relevant 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)
