137993-45-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 137993-45-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,9,9 and 3 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 137993-45:
(8*1)+(7*3)+(6*7)+(5*9)+(4*9)+(3*3)+(2*4)+(1*5)=174
174 % 10 = 4
So 137993-45-4 is a valid CAS Registry Number.
137993-45-4Relevant academic research and scientific papers
SYNTHESIS OF THE CARBAPENAM RING SYSTEM VIA CARBENE MEDIATED REARRANGEMENT OF AN N-BENZYLOXY-β-LACTAM
Williams, Matthew A.,Miller, Marvin J.
, p. 1807 - 1810 (2007/10/02)
The α-diazoester 1 in the presence of catalytic Rh2(OAc)4 was converted to the carbapenam 2.The synthesis of 1 and a proposed mechanism are described.
