219906-59-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 219906-59-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,9,9,0 and 6 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 219906-59:
(8*2)+(7*1)+(6*9)+(5*9)+(4*0)+(3*6)+(2*5)+(1*9)=159
159 % 10 = 9
So 219906-59-9 is a valid CAS Registry Number.
219906-59-9Relevant articles and documents
Unexpected enolization of 2-phenyl-3-piperidone derivatives
Daley, Valérie,Cavé, Christian,D'Angelo, Jean
, p. 2157 - 2162 (2007/10/03)
Alkylation of 2-phenyl-3-piperidone (17) with methyl iodide or methyl acrylate furnished the 4,4-dialkylated derivatives (18) or (19), respectively. This unexpected enolization towards the less substituted form can be interpreted considering the appreciab
