81231-02-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81231-02-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,2,3 and 1 respectively; the second part has 2 digits, 0 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 81231-02:
(7*8)+(6*1)+(5*2)+(4*3)+(3*1)+(2*0)+(1*2)=89
89 % 10 = 9
So 81231-02-9 is a valid CAS Registry Number.
81231-02-9Relevant articles and documents
Optimizing the 5-exo/6-endo ratio of vinyl radical cyclizations through catalysis with diphenyl diselenide
Crich, David,Hwang, Jae-Taeg,Liu, Hui
, p. 3105 - 3108 (1996)
The 5-exo/6-endo product ratio in the stannane mediated cyclizations of vinyl iodides is very significantly improved by operating in the presence of catalytic PhSeSePh with no loss in overall cyclization yield.
