142838-55-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 142838-55-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,2,8,3 and 8 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 142838-55:
(8*1)+(7*4)+(6*2)+(5*8)+(4*3)+(3*8)+(2*5)+(1*5)=139
139 % 10 = 9
So 142838-55-9 is a valid CAS Registry Number.
142838-55-9Relevant academic research and scientific papers
Synthesis of [b]-condensed alkyl 3-hydroxythiophene-2-carboxylates
Donoso,De Urries,Lissavetzky
, p. 526 - 528 (2007/10/02)
A simple modification of the Fiesselmann procedure for the synthesis of bicyclic alkyl 3-hydroxythiophene-2-carboxylatcs allow higher yields in only two steps.
