111491-35-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 111491-35-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,1,4,9 and 1 respectively; the second part has 2 digits, 3 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 111491-35:
(8*1)+(7*1)+(6*1)+(5*4)+(4*9)+(3*1)+(2*3)+(1*5)=91
91 % 10 = 1
So 111491-35-1 is a valid CAS Registry Number.
111491-35-1Relevant articles and documents
A direct preparation of 2-aryl-4-ethoxycarbonyl-3- pyrazolin-5-ones from aryl hydrazines
Taylor, Andrew W.,Cook, Richard T.
, p. 607 - 616 (2007/10/02)
Aryl hydrazines (1) possessing an electron-withdrawing substituent on the phenyl ring, on treatment with diethyl (ethoxymethylene)malonate in ethanolic sodium ethoxide solution, have directly afforded 2-aryl-4-ethoxy-carbonyl-3-pyrazolin-5-ones (4). Spect