117543-20-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 117543-20-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,7,5,4 and 3 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 117543-20:
(8*1)+(7*1)+(6*7)+(5*5)+(4*4)+(3*3)+(2*2)+(1*0)=111
111 % 10 = 1
So 117543-20-1 is a valid CAS Registry Number.
117543-20-1Relevant articles and documents
A Ring Expansion of Cyclic Ketones to α-Phenylthio Ketones via Lewis Acid Mediated Denitration
Kim, Sunggak,Park, Jung Ho
, p. 1323 - 1324 (2007/10/02)
The adducts of cyclic ketones with the lithium derivative of (phenylthio)nitromethane are readily rearranged to the ring expanded α-phenylthio ketones via aluminium chloride mediated denitration.
