131391-96-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 131391-96-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,3,9 and 1 respectively; the second part has 2 digits, 9 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 131391-96:
(8*1)+(7*3)+(6*1)+(5*3)+(4*9)+(3*1)+(2*9)+(1*6)=113
113 % 10 = 3
So 131391-96-3 is a valid CAS Registry Number.
131391-96-3Relevant academic research and scientific papers
Useful Synthesis of Coumestans
Mali, R.S.,Tilve, S.G.
, p. 1781 - 1791 (2007/10/02)
A convenient synthesis of coumestans involving a combination of lithiation and Wittig reactions is described.Compounds 1a and 1b on reaction with n-butyllithium followed by treatment with diethyloxalate provide ketoesters 3a and 3b.Reaction of 3(a-b) with
