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172655-12-8

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172655-12-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 172655-12-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,2,6,5 and 5 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 172655-12:
(8*1)+(7*7)+(6*2)+(5*6)+(4*5)+(3*5)+(2*1)+(1*2)=138
138 % 10 = 8
So 172655-12-8 is a valid CAS Registry Number.

172655-12-8Downstream Products

172655-12-8Relevant articles and documents

Radical-Cation Catalysis in the Synthesis of Diphenylmethanes via the Dealkylative Coupling of Benzylic Ethers

Rathore, Rajendra,Kochi, Jay K.

, p. 7479 - 7490 (1995)

The dealkylative coupling of benzyl alkyl ethers (ArCH2OR) to yield the corresponding diarylmethanes (ArCH2Ar) together with dialkoxymethane (ROCH2OR) is catalyzed by small amounts of 1-electron oxidants (such as aromatic cation radicals, NO(1+), etc.) or by an equivalent electrochemical (anodic) method.The catalytic method is successfully employed for the facile synthesis of a novel macrocyclic crown ether 18 that contains a diarylmethane linkage.On the basis of the spectral observation of the radical cation ArCH2OR.+ and the excellent catalytic efficiency with turnover numbers in excess of 1E2, an electron-transfer and an alternative electrophilic chain mechanism are discussed for the dealkylative coupling process.

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