118543-99-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 118543-99-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,8,5,4 and 3 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 118543-99:
(8*1)+(7*1)+(6*8)+(5*5)+(4*4)+(3*3)+(2*9)+(1*9)=140
140 % 10 = 0
So 118543-99-0 is a valid CAS Registry Number.
118543-99-0Relevant articles and documents
A New, Convenient Synthesis of Monoaroylpyrazines via Homolytic Substitution
Heinisch, G.,Loetsch, G.
, p. 119 - 121 (2007/10/02)
Reactions of 2-pyrazinecarboxylic acid (1) with aroyl radicals to give 5-aroyl-2-pyrazinecarboxylic acids 3 followed by decarboxylation provide convenient access to aryl 2-pyrazinyl ketones (2-aroylpyrazines) 4.
