81844-25-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81844-25-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,8,4 and 4 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 81844-25:
(7*8)+(6*1)+(5*8)+(4*4)+(3*4)+(2*2)+(1*5)=139
139 % 10 = 9
So 81844-25-9 is a valid CAS Registry Number.
81844-25-9Relevant academic research and scientific papers
A FACILE ONE-POT SYNTHESIS OF DIACYLPYRROLES
Zen, Shonosuke,Harada, Kazuho
, p. 366 - 369 (2007/10/02)
Various diacylpyrrole derivatives (1) were synthesized in good yields by using β-diketones (4) such as dibenzoylmethane in reaction with primary aliphatic nitro compounds (2) and acetyl chloride.The structures of 1 were established by chemical and spectra
