139179-48-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139179-48-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,1,7 and 9 respectively; the second part has 2 digits, 4 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 139179-48:
(8*1)+(7*3)+(6*9)+(5*1)+(4*7)+(3*9)+(2*4)+(1*8)=159
159 % 10 = 9
So 139179-48-9 is a valid CAS Registry Number.
139179-48-9Relevant articles and documents
An Intramolecular Addition-Elimination Strategy For The Synthesis Of Carbapenems
Ziegler, C. B.,Curran, W. V.,Feigelson, G. B.,Bitha, P.,Fabio, P.,et al.
, p. 12085 - 12096 (2007/10/02)
The synthesis of 2- carbapenem carboxylate 20 is described.The key step is a base mediated addition-elimination ring closure of a iodovinyl sulfone 12.
