143159-83-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 143159-83-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,1,5 and 9 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 143159-83:
(8*1)+(7*4)+(6*3)+(5*1)+(4*5)+(3*9)+(2*8)+(1*3)=125
125 % 10 = 5
So 143159-83-5 is a valid CAS Registry Number.
143159-83-5Relevant academic research and scientific papers
A new strategy for the conversion of penams into cephems via allene chemistry
Farina, Vittorio,Kant, Joydeep
, p. 3559 - 3562 (2007/10/02)
We describe an extension of the Morin rearrangement in which 3-norcephalosporins bearing sulfur substituents at C(3) are obtained directly from an allenic intermediate, which is efficiently prepared from penicillin V sulfoxide.
