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108439-89-0

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108439-89-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 108439-89-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,8,4,3 and 9 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 108439-89:
(8*1)+(7*0)+(6*8)+(5*4)+(4*3)+(3*9)+(2*8)+(1*9)=140
140 % 10 = 0
So 108439-89-0 is a valid CAS Registry Number.

108439-89-0Relevant articles and documents

Reexamen de la transposition de Fries des acetate et propionate de creosol

Martin, Robert,Gavard, Jean-Pierre,Delfly, Michel,Demerseman, Pierre,Tromelin, Anne

, p. 659 - 662 (2007/10/02)

The Fries rearrangement of creosol acetate and propionate yields meta acylphenols through meta ketoesters according to an intermolecular process.The acyl group undergoes a migration to the meta position, solely due to the combination of the electronic effects of the other substituents.A similar directing effect occurs in a transacylation reaction between a ketoester of creosol and the creosol itself.The two hitherto unknown propiophenones stemming from isocreosol are synthesized and described.

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