81697-55-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81697-55-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,6,9 and 7 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 81697-55:
(7*8)+(6*1)+(5*6)+(4*9)+(3*7)+(2*5)+(1*5)=164
164 % 10 = 4
So 81697-55-4 is a valid CAS Registry Number.
81697-55-4Relevant academic research and scientific papers
Structure of the Cornubert ketone
Pettit, George R.,Thomas, Evan G.
, p. 629 - 633 (2007/10/02)
The self-condensation of cyclohexanone in diethyl ether catalyzed by sodium amide has been found to provide a one-step route to pyran 3.Evidence is presented that the Cornubert ketone formed by this reaction corresponds to ketol 2 which readily rearranges
