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25263-08-5

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25263-08-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 25263-08-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,5,2,6 and 3 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 25263-08:
(7*2)+(6*5)+(5*2)+(4*6)+(3*3)+(2*0)+(1*8)=95
95 % 10 = 5
So 25263-08-5 is a valid CAS Registry Number.

25263-08-5Relevant articles and documents

PHASE-TRANSFER ALKYLATION OF ETHYL DIPHENYLPHOSPHINOYLACETATE

Yarkevich, A. N.,Tsvetkov, E. N.

, p. 1451 - 1455 (2007/10/03)

Phase-transfer C-alkylation of ethyl diphenylphosphinoylacetate by primary alkyl halides with and without a solvent in the presence of K2CO3 and Cs2CO3 as bases gives exclusively monoalkylated products.Terminal dihalides and oligoethylene glycol bis(p-toluenesulfonates) form products of both mono- and cycloalkylation, as well as diphosphinoyl compounds, depending on the length of the hydrocarbon or oligoether chain and the reactant ratio.In all the cases studied, addition of Cs2CO3 substantially accelerates the reaction.

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