141939-90-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 141939-90-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,1,9,3 and 9 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 141939-90:
(8*1)+(7*4)+(6*1)+(5*9)+(4*3)+(3*9)+(2*9)+(1*0)=144
144 % 10 = 4
So 141939-90-4 is a valid CAS Registry Number.
141939-90-4Relevant academic research and scientific papers
SYNTHESIS of 1,2,4-TRIAZINES; XIII. REGIOSELECTIVE SYNTHESIS of TRIALKYL-1,2,4-TRIAZINES
Ohsumi, Tadashi,Neunhoeffer, Hans
, p. 893 - 903 (2007/10/02)
Trialkyl-1,2,4-triazines (3) were prepared by heating α-oxoacylhydrazones (4) or N,N-dimethylaminomethylene hydrazones (19) with ammonium acetate at 100 deg C.The solvent plays an important role in the regioselectivity of these reactions.
