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452093-85-5

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452093-85-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 452093-85-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,5,2,0,9 and 3 respectively; the second part has 2 digits, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 452093-85:
(8*4)+(7*5)+(6*2)+(5*0)+(4*9)+(3*3)+(2*8)+(1*5)=145
145 % 10 = 5
So 452093-85-5 is a valid CAS Registry Number.

452093-85-5Downstream Products

452093-85-5Relevant articles and documents

Ortho substituents direct regioselective addition of tributyltin hydride to unsymmetrical diaryl (or heteroaryl) alkynes: An efficient route to stannylated stilbene derivatives

Alami, Mouad,Liron, Frederic,Gervais, Marina,Peyrat, Jean-Francois,Brion, Jean-Daniel

, p. 1578 - 1580 (2007/10/03)

An unprecedented ortho-directing effect (ODE) in diaryl alkynes 1 (R=electron-withdrawing or electron-donating group) promotes regioselective addition of tributyltin hydride to the triple bond and afforded efficiently stannylated unsymmetrical 1,2-diaryl olefins 2. The precise contributions of steric, electronic, and coordinative factors, which control this regioselectivity are highlighted. The results are rationalized in terms of electronic polarization across the alkyne bond, induced by the ortho substituent whatever its electronic nature.

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