258522-20-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 258522-20-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,8,5,2 and 2 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 258522-20:
(8*2)+(7*5)+(6*8)+(5*5)+(4*2)+(3*2)+(2*2)+(1*0)=142
142 % 10 = 2
So 258522-20-2 is a valid CAS Registry Number.
258522-20-2Relevant academic research and scientific papers
Asymmetric palladium annulation: Formal synthesis of (+)-huperzine A
Chassaing, Christophe,Haudrechy, Arnaud,Langlois, Yves
, p. 8805 - 8809 (2007/10/03)
A new formal stereoselective synthesis of (+)-huperzine A 1 was achieved using as a key step a palladium mediated annulation between 2-methylene-1,3- propanediol diacetate and (1R,2S)-2-phenylcyclohexanol derived β-ketoester 14.
