25871-99-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 25871-99-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,5,8,7 and 1 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 25871-99:
(7*2)+(6*5)+(5*8)+(4*7)+(3*1)+(2*9)+(1*9)=142
142 % 10 = 2
So 25871-99-2 is a valid CAS Registry Number.
InChI:InChI=1/C9H6ClFO/c10-6-5-9(12)7-1-3-8(11)4-2-7/h1-6H/b6-5+
25871-99-2Relevant academic research and scientific papers
Doubly Vinylogous 4H-Pyrones from Pyrylium Salts and Aryl β-Chlorovinyl Ketones
Balaban, Alexandru T.,Fahmy, Mahmoud,Gheorghiu, Mircea D.,Wray, Victor
, p. 1807 - 1817 (2007/10/02)
Aryl β-chlorovinyl ketones react with the methyl group of 2,6-di-tert-butyl-4-methylpyrylium perchlorate in the presence of pyridine to yield doubly vinylogous 4H-pyrones 3.Only one configuration and conformation from the eight possible structures appears
