556813-33-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 556813-33-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,5,6,8,1 and 3 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 556813-33:
(8*5)+(7*5)+(6*6)+(5*8)+(4*1)+(3*3)+(2*3)+(1*3)=173
173 % 10 = 3
So 556813-33-3 is a valid CAS Registry Number.
556813-33-3Relevant academic research and scientific papers
Phosphoniosilylation: An Efficient and Practical Method for the β-Functionalization of Enones
Kozikowski, Alan P.,Jung, Sun Ho
, p. 3400 - 3402 (2007/10/02)
A useful procedure for the β-functionalization of enones is described in which the Wittig reaction is combined with an initial phosphoniosilylation process.
