175657-50-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 175657-50-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,5,6,5 and 7 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 175657-50:
(8*1)+(7*7)+(6*5)+(5*6)+(4*5)+(3*7)+(2*5)+(1*0)=168
168 % 10 = 8
So 175657-50-8 is a valid CAS Registry Number.
175657-50-8Relevant 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.
