1337971-77-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1337971-77-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,3,7,9,7 and 1 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1337971-77:
(9*1)+(8*3)+(7*3)+(6*7)+(5*9)+(4*7)+(3*1)+(2*7)+(1*7)=193
193 % 10 = 3
So 1337971-77-3 is a valid CAS Registry Number.
1337971-77-3Relevant articles and documents
Improved synthesis of d,l-fluorocitric acid
Vardanyan, Ruben,Kumirov, Vlad K.,Hruby, Victor J.
, p. 920 - 924 (2011)
We propose a decagram synthesis of commercially unavailable fluorocitric acid. The synthesis begins with benzyl fluoroacetate, which is converted to dibenzyl 2-fluoro-3-oxosuccinate, followed by condensation with malonic acid or its monobenzyl ester and subsequent hydrogenolysis.