23040-21-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 23040-21-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,0,4 and 0 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 23040-21:
(7*2)+(6*3)+(5*0)+(4*4)+(3*0)+(2*2)+(1*1)=53
53 % 10 = 3
So 23040-21-3 is a valid CAS Registry Number.
23040-21-3Relevant academic research and scientific papers
Reaction of Oxygen Nucleophiles With β-Alkoxyvinylphosphonium Salts. Isolation of Phosphine Oxides.
Ruder, Suzanne M.,Norwood, Bradley K.
, p. 861 - 864 (2007/10/02)
A variety of β-alkoxyvinylphosphonium bromides were prepared and reacted with sodium ethoxide and dimsyl anion to generate good yields of phosphine oxides 3 rather than the previously reported ylide 4.
