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233272-56-5

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233272-56-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 233272-56-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,3,3,2,7 and 2 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 233272-56:
(8*2)+(7*3)+(6*3)+(5*2)+(4*7)+(3*2)+(2*5)+(1*6)=115
115 % 10 = 5
So 233272-56-5 is a valid CAS Registry Number.

233272-56-5Relevant articles and documents

Regiospecific acylation of acetals. A convenient method to obtain β- methoxyvinyl trichloromethyl ketones

Martins, Marcos A.P.,Bastos, Giovani P.,Bonacorso, Helio G.,Zanatta, Nilo,Flores, Alex F.C.,Siqueira, Geonir M.

, p. 4309 - 4312 (1999)

The regiochemistry of the acylation of enol ethers, generated in situ, from acetals of unsymmetrical ketones is reported. These results demonstrate a convenient one-pot method to obtain a series of β-methoxyvinyl trichloromethyl ketones [CCl3COCH=C(OMe)R, where R=Et, n-Bu, i-Pt, (CH2)2C(OMe)=CHC(O)CCl3 and (CH2)5CO2CH3)] in high yields.

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