142731-40-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 142731-40-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,2,7,3 and 1 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 142731-40:
(8*1)+(7*4)+(6*2)+(5*7)+(4*3)+(3*1)+(2*4)+(1*0)=106
106 % 10 = 6
So 142731-40-6 is a valid CAS Registry Number.
142731-40-6Relevant articles and documents
Synthesis and pharmacology of 3-aryl-5,6-dihydro-6-oxo-1(4H)-pyridazineacetic acid derivatives
Kane,Huber,Miller,Kehne
, p. 249 - 251 (2007/10/02)
The title compounds were prepared by alkylation of 6-aryl-4,5-dihydro-3(2H)-pyridazinones with esters of α-bromoacetic acid. Hydrolysis of these esters afforded the corresponding carboxylic acids which were coupled with various amines yielding 6-oxo-1(4H)
