71641-62-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 71641-62-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,6,4 and 1 respectively; the second part has 2 digits, 6 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 71641-62:
(7*7)+(6*1)+(5*6)+(4*4)+(3*1)+(2*6)+(1*2)=118
118 % 10 = 8
So 71641-62-8 is a valid CAS Registry Number.
71641-62-8Relevant academic research and scientific papers
Copper-catalyzed oxidation reactions: An alternative synthesis of 3,6-dinitroxanthone
Farrell,Moskowitz,Terrier
, p. 231 - 235 (2007/10/02)
Bis-(4-nitrophenyl)methane and derivatives can be oxidized to the corresponding ketones by refluxing with Cu powder in N,N-dimethylformamide (DMF). Further reaction of the 2,2'-diiodoketone, under the same conditions, leads to the title xanthone.
