137242-84-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 137242-84-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,2,4 and 2 respectively; the second part has 2 digits, 8 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 137242-84:
(8*1)+(7*3)+(6*7)+(5*2)+(4*4)+(3*2)+(2*8)+(1*4)=123
123 % 10 = 3
So 137242-84-3 is a valid CAS Registry Number.
137242-84-3Relevant articles and documents
A convenient synthesis of β-lactams from alkylthioimidates
Grochowski, Edward,Pupek, Krzysztof
, p. 6759 - 6768 (2007/10/02)
Stereoselective syntheses of trans-3,4,4-substituted-azetidin-2-ones from alkylthioimidates are described. Reduction of these compounds gave stereoselectively cis-4-alkyl-azetidin-2-ones which could be useful intermediates for preparation of biologically
