154109-98-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 154109-98-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,4,1,0 and 9 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 154109-98:
(8*1)+(7*5)+(6*4)+(5*1)+(4*0)+(3*9)+(2*9)+(1*8)=125
125 % 10 = 5
So 154109-98-5 is a valid CAS Registry Number.
154109-98-5Relevant academic research and scientific papers
RING TRANSFORMATIONS OF PYRAZOLONES VIA AZO-OLEFINS
Schmitz, Ernst,Lutze, Gerhard,Kirschke, Klaus,Huebner, Petra
, p. 61 - 64 (2007/10/02)
Instead of substitution, 4-halo-pyrazolones undergo ring opening to azo-olefins (2, 12, 16) on reaction with nucleophiles.Attempted Hofmann degradation of N-Haloamides 4 has to compete with either ring closure, involving NHCl-shift to 7, or formation of m
