89664-76-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 89664-76-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,9,6,6 and 4 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 89664-76:
(7*8)+(6*9)+(5*6)+(4*6)+(3*4)+(2*7)+(1*6)=196
196 % 10 = 6
So 89664-76-6 is a valid CAS Registry Number.
89664-76-6Relevant articles and documents
A synthesis of 2-acyl-3-hydroxythiophenes
Adamczewska,Barker,Huddleston,Wood
, p. 1083 - 1096 (2007/10/03)
2-Acyl-3-hydroxythiophenes have been made by the reaction of the anion of a mercaptoketone with dimethyl acetylenedicarboxylate to give a hydroxythiophene ester which is then hydrolysed and decarboxylated.